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<h1 class="title">std/formatfloat</h1>
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<ul class="simple simple-toc" id="toc-list">
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<li>
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<a class="reference reference-toplevel" href="#6" id="56">Imports</a>
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<summary><a class="reference reference-toplevel" href="#12" id="62">Procs</a></summary>
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<ul class="simple nested-toc-section">$
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<li><a class="reference" href="#%24" title="`$`(x: float | float32): string">`$`(x: float | float32): string</a></li>
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</ul>
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<ul class="simple nested-toc-section">addFloat
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<li><a class="reference" href="#addFloat%2Cstring%2C" title="addFloat(result: var string; x: float | float32)">addFloat(result: var string; x: float | float32)</a></li>
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</ul>
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<ul class="simple nested-toc-section">addFloatRoundtrip
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<li><a class="reference" href="#addFloatRoundtrip%2Cstring%2C" title="addFloatRoundtrip(result: var string; x: float | float32)">addFloatRoundtrip(result: var string; x: float | float32)</a></li>
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</ul>
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<ul class="simple nested-toc-section">addFloatSprintf
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<li><a class="reference" href="#addFloatSprintf%2Cstring%2Cfloat" title="addFloatSprintf(result: var string; x: float)">addFloatSprintf(result: var string; x: float)</a></li>
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</ul>
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<ul class="simple nested-toc-section">writeFloatToBuffer
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<li><a class="reference" href="#writeFloatToBuffer%2Carray%5B%2Cchar%5D%2C" title="writeFloatToBuffer(buf: var array[65, char]; value: BiggestFloat | float32): int">writeFloatToBuffer(buf: var array[65, char]; value: BiggestFloat | float32): int</a></li>
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</ul>
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<ul class="simple nested-toc-section">writeFloatToBufferRoundtrip
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<li><a class="reference" href="#writeFloatToBufferRoundtrip%2Carray%5B%2Cchar%5D%2CBiggestFloat" title="writeFloatToBufferRoundtrip(buf: var array[65, char]; value: BiggestFloat): int">writeFloatToBufferRoundtrip(buf: var array[65, char]; value: BiggestFloat): int</a></li>
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<li><a class="reference" href="#writeFloatToBufferRoundtrip%2Carray%5B%2Cchar%5D%2Cfloat32" title="writeFloatToBufferRoundtrip(buf: var array[65, char]; value: float32): int">writeFloatToBufferRoundtrip(buf: var array[65, char]; value: float32): int</a></li>
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</ul>
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<ul class="simple nested-toc-section">writeFloatToBufferSprintf
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<li><a class="reference" href="#writeFloatToBufferSprintf%2Carray%5B%2Cchar%5D%2CBiggestFloat" title="writeFloatToBufferSprintf(buf: var array[65, char]; value: BiggestFloat): int">writeFloatToBufferSprintf(buf: var array[65, char]; value: BiggestFloat): int</a></li>
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</ul>
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</details>
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<div class="nine columns" id="content">
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<a href="https://github.com/nim-lang/Nim/tree/devel/lib/std/formatfloat.nim#L1" class="link-seesrc" target="_blank">Source</a>
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<a href="https://github.com/nim-lang/Nim/edit/devel/lib/std/formatfloat.nim#L1" class="link-seesrc" target="_blank" >Edit</a>
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<div id="tocRoot"></div>
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<p class="module-desc">This module implements formatting floats as strings.</p>
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<div class="section" id="6">
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<h1><a class="toc-backref" href="#6">Imports</a></h1>
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<dl class="item">
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<a class="reference external" href="assertions.html">assertions</a>, <a class="reference external" href="ansi_c.html">ansi_c</a>, <a class="reference external" href="dragonbox.html">dragonbox</a>, <a class="reference external" href="schubfach.html">schubfach</a>
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<div class="section" id="12">
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<h1><a class="toc-backref" href="#12">Procs</a></h1>
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<dl class="item">
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<div id="$-procs-all">
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<div id="$">
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<dt><pre><span class="Keyword">func</span> <a href="#%24"><span class="Identifier">`$`</span></a><span class="Other">(</span><span class="Identifier">x</span><span class="Other">:</span> <a href="system.html#float"><span class="Identifier">float</span></a> <span class="Operator">|</span> <a href="system.html#float32"><span class="Identifier">float32</span></a><span class="Other">)</span><span class="Other">:</span> <a href="system.html#string"><span class="Identifier">string</span></a></pre></dt>
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<dd>
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Outplace version of <tt class="docutils literal"><span class="pre"><span class="Identifier">addFloat</span></span></tt>.
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<a href="https://github.com/nim-lang/Nim/tree/devel/lib/std/formatfloat.nim#L145" class="link-seesrc" target="_blank">Source</a>
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<a href="https://github.com/nim-lang/Nim/edit/devel/lib/std/formatfloat.nim#L145" class="link-seesrc" target="_blank" >Edit</a>
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</dd>
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</div>
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</div>
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<div id="addFloat-procs-all">
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<div id="addFloat,string,">
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<dt><pre><span class="Keyword">proc</span> <a href="#addFloat%2Cstring%2C"><span class="Identifier">addFloat</span></a><span class="Other">(</span><span class="Identifier">result</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="system.html#string"><span class="Identifier">string</span></a><span class="Other">;</span> <span class="Identifier">x</span><span class="Other">:</span> <a href="system.html#float"><span class="Identifier">float</span></a> <span class="Operator">|</span> <a href="system.html#float32"><span class="Identifier">float32</span></a><span class="Other">)</span> {.<span class="Identifier">inline</span>.}</pre></dt>
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<dd>
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Converts float to its string representation and appends it to <tt class="docutils literal"><span class="pre"><span class="Identifier">result</span></span></tt>.
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<p><strong class="examples_text">Example:</strong></p>
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<pre class="listing"><span class="Keyword">var</span>
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<span class="Identifier">s</span> <span class="Operator">=</span> <span class="StringLit">"foo:"</span>
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<span class="Identifier">b</span> <span class="Operator">=</span> <span class="FloatNumber">45.67</span>
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<span class="Identifier">s</span><span class="Operator">.</span><span class="Identifier">addFloat</span><span class="Punctuation">(</span><span class="FloatNumber">45.67</span><span class="Punctuation">)</span>
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<span class="Identifier">assert</span> <span class="Identifier">s</span> <span class="Operator">==</span> <span class="StringLit">"foo:45.67"</span></pre>
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<a href="https://github.com/nim-lang/Nim/tree/devel/lib/std/formatfloat.nim#L125" class="link-seesrc" target="_blank">Source</a>
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<a href="https://github.com/nim-lang/Nim/edit/devel/lib/std/formatfloat.nim#L125" class="link-seesrc" target="_blank" >Edit</a>
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</dd>
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</div>
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</div>
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<div id="addFloatRoundtrip-procs-all">
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<div id="addFloatRoundtrip,string,">
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<dt><pre><span class="Keyword">proc</span> <a href="#addFloatRoundtrip%2Cstring%2C"><span class="Identifier">addFloatRoundtrip</span></a><span class="Other">(</span><span class="Identifier">result</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="system.html#string"><span class="Identifier">string</span></a><span class="Other">;</span> <span class="Identifier">x</span><span class="Other">:</span> <a href="system.html#float"><span class="Identifier">float</span></a> <span class="Operator">|</span> <a href="system.html#float32"><span class="Identifier">float32</span></a><span class="Other">)</span></pre></dt>
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<dd>
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<a href="https://github.com/nim-lang/Nim/tree/devel/lib/std/formatfloat.nim#L87" class="link-seesrc" target="_blank">Source</a>
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<a href="https://github.com/nim-lang/Nim/edit/devel/lib/std/formatfloat.nim#L87" class="link-seesrc" target="_blank" >Edit</a>
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</dd>
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</div>
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</div>
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<div id="addFloatSprintf-procs-all">
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<div id="addFloatSprintf,string,float">
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<dt><pre><span class="Keyword">proc</span> <a href="#addFloatSprintf%2Cstring%2Cfloat"><span class="Identifier">addFloatSprintf</span></a><span class="Other">(</span><span class="Identifier">result</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="system.html#string"><span class="Identifier">string</span></a><span class="Other">;</span> <span class="Identifier">x</span><span class="Other">:</span> <a href="system.html#float"><span class="Identifier">float</span></a><span class="Other">)</span> {.<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span>
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<span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
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<dd>
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<a href="https://github.com/nim-lang/Nim/tree/devel/lib/std/formatfloat.nim#L95" class="link-seesrc" target="_blank">Source</a>
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<a href="https://github.com/nim-lang/Nim/edit/devel/lib/std/formatfloat.nim#L95" class="link-seesrc" target="_blank" >Edit</a>
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</dd>
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</div>
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<div id="writeFloatToBuffer-procs-all">
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<div id="writeFloatToBuffer,array[,char],">
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<dt><pre><span class="Keyword">proc</span> <a href="#writeFloatToBuffer%2Carray%5B%2Cchar%5D%2C"><span class="Identifier">writeFloatToBuffer</span></a><span class="Other">(</span><span class="Identifier">buf</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="system.html#array"><span class="Identifier">array</span></a><span class="Other">[</span><span class="DecNumber">65</span><span class="Other">,</span> <a href="system.html#char"><span class="Identifier">char</span></a><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">:</span> <a href="ctypes.html#BiggestFloat"><span class="Identifier">BiggestFloat</span></a> <span class="Operator">|</span> <a href="system.html#float32"><span class="Identifier">float32</span></a><span class="Other">)</span><span class="Other">:</span> <a href="system.html#int"><span class="Identifier">int</span></a> {.
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<span class="Identifier">inline</span>.}</pre></dt>
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<dd>
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<a href="https://github.com/nim-lang/Nim/tree/devel/lib/std/formatfloat.nim#L81" class="link-seesrc" target="_blank">Source</a>
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<a href="https://github.com/nim-lang/Nim/edit/devel/lib/std/formatfloat.nim#L81" class="link-seesrc" target="_blank" >Edit</a>
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</dd>
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</div>
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</div>
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<div id="writeFloatToBufferRoundtrip-procs-all">
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<div id="writeFloatToBufferRoundtrip,array[,char],BiggestFloat">
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<dt><pre><span class="Keyword">proc</span> <a href="#writeFloatToBufferRoundtrip%2Carray%5B%2Cchar%5D%2CBiggestFloat"><span class="Identifier">writeFloatToBufferRoundtrip</span></a><span class="Other">(</span><span class="Identifier">buf</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="system.html#array"><span class="Identifier">array</span></a><span class="Other">[</span><span class="DecNumber">65</span><span class="Other">,</span> <a href="system.html#char"><span class="Identifier">char</span></a><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">:</span> <a href="ctypes.html#BiggestFloat"><span class="Identifier">BiggestFloat</span></a><span class="Other">)</span><span class="Other">:</span> <a href="system.html#int"><span class="Identifier">int</span></a> {.
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<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
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<dd>
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<p>This is the implementation to format floats.</p>
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<p>returns the amount of bytes written to <tt class="docutils literal"><span class="pre"><span class="Identifier">buf</span></span></tt> not counting the terminating '0' character.</p>
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<a href="https://github.com/nim-lang/Nim/tree/devel/lib/std/formatfloat.nim#L26" class="link-seesrc" target="_blank">Source</a>
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<a href="https://github.com/nim-lang/Nim/edit/devel/lib/std/formatfloat.nim#L26" class="link-seesrc" target="_blank" >Edit</a>
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</dd>
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</div>
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<div id="writeFloatToBufferRoundtrip,array[,char],float32">
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<dt><pre><span class="Keyword">proc</span> <a href="#writeFloatToBufferRoundtrip%2Carray%5B%2Cchar%5D%2Cfloat32"><span class="Identifier">writeFloatToBufferRoundtrip</span></a><span class="Other">(</span><span class="Identifier">buf</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="system.html#array"><span class="Identifier">array</span></a><span class="Other">[</span><span class="DecNumber">65</span><span class="Other">,</span> <a href="system.html#char"><span class="Identifier">char</span></a><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">:</span> <a href="system.html#float32"><span class="Identifier">float32</span></a><span class="Other">)</span><span class="Other">:</span> <a href="system.html#int"><span class="Identifier">int</span></a> {.
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<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
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<dd>
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<a href="https://github.com/nim-lang/Nim/tree/devel/lib/std/formatfloat.nim#L34" class="link-seesrc" target="_blank">Source</a>
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<a href="https://github.com/nim-lang/Nim/edit/devel/lib/std/formatfloat.nim#L34" class="link-seesrc" target="_blank" >Edit</a>
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</dd>
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</div>
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<div id="writeFloatToBufferSprintf-procs-all">
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<div id="writeFloatToBufferSprintf,array[,char],BiggestFloat">
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<dt><pre><span class="Keyword">proc</span> <a href="#writeFloatToBufferSprintf%2Carray%5B%2Cchar%5D%2CBiggestFloat"><span class="Identifier">writeFloatToBufferSprintf</span></a><span class="Other">(</span><span class="Identifier">buf</span><span class="Other">:</span> <span class="Keyword">var</span> <a href="system.html#array"><span class="Identifier">array</span></a><span class="Other">[</span><span class="DecNumber">65</span><span class="Other">,</span> <a href="system.html#char"><span class="Identifier">char</span></a><span class="Other">]</span><span class="Other">;</span> <span class="Identifier">value</span><span class="Other">:</span> <a href="ctypes.html#BiggestFloat"><span class="Identifier">BiggestFloat</span></a><span class="Other">)</span><span class="Other">:</span> <a href="system.html#int"><span class="Identifier">int</span></a> {.
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<span><span class="Other pragmadots">...</span></span><span class="pragmawrap"><span class="Identifier">raises</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">tags</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span><span class="Other">,</span> <span class="Identifier">forbids</span><span class="Other">:</span> <span class="Other">[</span><span class="Other">]</span></span>.}</pre></dt>
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<dd>
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<p>This is the implementation to format floats.</p>
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<p>returns the amount of bytes written to <tt class="docutils literal"><span class="pre"><span class="Identifier">buf</span></span></tt> not counting the terminating '0' character.</p>
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<a href="https://github.com/nim-lang/Nim/tree/devel/lib/std/formatfloat.nim#L47" class="link-seesrc" target="_blank">Source</a>
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<a href="https://github.com/nim-lang/Nim/edit/devel/lib/std/formatfloat.nim#L47" class="link-seesrc" target="_blank" >Edit</a>
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