cter is a letter</p>
<h2><a href="#char-is-digit" id="char-is-digit"></a>:char_is_digit</h2>
<p>Pushes TRUE onto the BOOLEAN stack if the popped character is a digit</p>
<h2><a href="#char-is-whitespace" id="char-is-whitespace"></a>:char_is_whitespace</h2>
<p>Pushes TRUE onto the BOOLEAN stack if the popped character is whitespace (newline, space, or tab)</p>
<h2><a href="#char-from-float" id="char-from-float"></a>:char_from_float</h2>
<p>Pops the FLOAT stack, converts the top item to a whole number, and pu