ype-elt">Symbol.Shape.Type.elt</a> <span class="arrow">&#45;&gt;</span></span> <a href="../Symbol/Shape/Type/index.html#type-elt">Symbol.Shape.Type.elt</a></span></code></div><div class="spec-doc"><p><code>signum a</code> returns the signum function of the scalar <code>a</code>, which is -1 for negative, 0 for zero, and 1 for positive values.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-floor"><a href="#val-floor" class="anchor"></a><code><span><span class="keyword">val</sp