™s circumference to its diameter</p>
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<p></p>
<p><code>real</code> <strong><code>e</code></strong><code>()</code><br>
<span class="math inline">\(e\)</span>, the base of the natural logarithm</p>
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<p></p>
<p><code>real</code> <strong><code>sqrt2</code></strong><code>()</code><br>
The square root of 2</p>
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<p></p>
<p><code>real</code> <strong><code>log2</code></strong><code>()</code><br>
The natural logarithm of 2</p>
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