docs/help/leftargument.html


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  <title>BQN: Mathematical Double-struck W (𝕨)</title>
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<h1 id="mathematical-double-struck-w-𝕨"><a class="header" href="#mathematical-double-struck-w-𝕨">Mathematical Double-struck W (<code><span class='Value'>𝕨</span></code>)</a></h1>
<h2 id="𝕨-left-argument"><a class="header" href="#𝕨-left-argument"><code><span class='Value'>𝕨</span></code>: Left Argument</a></h2>
<p><a class="fulldoc" href="../doc/syntax.html#blocks">→full documentation</a></p>
<p>A variable assigned to the left argument of a block. <code><span class='Function'>𝕎</span></code> can be used to access the left argument as a function.</p>
<a class="replLink" title="Open in the REPL" target="_blank" href="https://mlochbaum.github.io/BQN/try.html#code=NSB78J2VqH0gMQoKLeKAv8O3IHvwnZWO8J2VqX3CqCA0">↗️</a><pre>    <span class='Number'>5</span> <span class='Brace'>{</span><span class='Value'>𝕨</span><span class='Brace'>}</span> <span class='Number'>1</span>
5

    <span class='Function'>-</span><span class='Ligature'>‿</span><span class='Function'>÷</span> <span class='Brace'>{</span><span class='Function'>𝕎</span><span class='Value'>𝕩</span><span class='Brace'>}</span><span class='Modifier'>¨</span> <span class='Number'>4</span>
⟨ ¯4 0.25 ⟩
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<p>In a call with no left argument, <code><span class='Value'>𝕨</span></code> functions as <a href="nothing.html">Nothing</a> and <code><span class='Function'>𝕎</span></code> can't be used.</p>
<a class="replLink" title="Open in the REPL" target="_blank" href="https://mlochbaum.github.io/BQN/try.html#code=eygt8J2VqCnii4jwnZWpfSA2CgoyIHsoLfCdlagp4ouI8J2VqX0gNg==">↗️</a><pre>    <span class='Brace'>{</span><span class='Paren'>(</span><span class='Function'>-</span><span class='Value'>𝕨</span><span class='Paren'>)</span><span class='Function'>⋈</span><span class='Value'>𝕩</span><span class='Brace'>}</span> <span class='Number'>6</span>
⟨ 6 ⟩

    <span class='Number'>2</span> <span class='Brace'>{</span><span class='Paren'>(</span><span class='Function'>-</span><span class='Value'>𝕨</span><span class='Paren'>)</span><span class='Function'>⋈</span><span class='Value'>𝕩</span><span class='Brace'>}</span> <span class='Number'>6</span>
⟨ ¯2 6 ⟩
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