2021-01-21 13:40:28 +01:00
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"><head>
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<title>.</title>
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</style>
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</head><body>
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2022-06-03 12:41:52 +02:00
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<p><br/><br/>
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2021-01-21 13:40:28 +01:00
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Numbers in RETRO are signed integers.
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<br/><br/>
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2021-03-30 13:58:25 +02:00
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<span class="h2">Sigil</span>
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2021-01-21 13:40:28 +01:00
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<br/><br/>
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2021-03-30 13:58:25 +02:00
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All numbers start with a <span class="tt">#</span> sigil.
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2021-01-21 13:40:28 +01:00
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<br/><br/>
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<span class="h2">Namespace</span>
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<br/><br/>
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Most words operating on numbers are in the <span class="tt">n:</span> namespace.
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<br/><br/>
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<br/><br/>
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A default RETRO system with 32 bit cells provides a range of
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-2,147,483,648 to 2,147,483,647. For 64 bit systems, the range
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will be -9,223,372,036,854,775,807 to 9,223,372,036,854,775,806.
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<br/><br/>
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You can check the range your VM and image support using:
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<br/><br/>
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<tt class='indentedcode'>n:MIN</tt>
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<tt class='indentedcode'>n:MAX</tt>
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<br/><br/>
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These will return the limits for your system.
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<br/><br/>
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<span class="h2">Comparisons</span>
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<br/><br/>
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RETRO provides a number of comparison words for numeric values.
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<br/><br/>
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The basic comparators are:
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<br/><br/>
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<tt class='indentedcode'>-eq?</tt>
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<tt class='indentedcode'>eq?</tt>
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<tt class='indentedcode'>lt?</tt>
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<tt class='indentedcode'>lteq?</tt>
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<tt class='indentedcode'>gt?</tt>
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<tt class='indentedcode'>gteq?</tt>
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<br/><br/>
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Additionally RETRO also provides:
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<br/><br/>
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<tt class='indentedcode'>n:-zero?</tt>
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<tt class='indentedcode'>n:between?</tt>
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<tt class='indentedcode'>n:even?</tt>
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<tt class='indentedcode'>n:negative?</tt>
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<tt class='indentedcode'>n:odd?</tt>
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<tt class='indentedcode'>n:positive?</tt>
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<tt class='indentedcode'>n:strictly-positive?</tt>
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<tt class='indentedcode'>n:zero?</tt>
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<br/><br/>
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<br/><br/>
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<tt class='indentedcode'>+</tt>
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<tt class='indentedcode'>-</tt>
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<tt class='indentedcode'>*</tt>
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<tt class='indentedcode'>/</tt>
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<tt class='indentedcode'>mod</tt>
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<tt class='indentedcode'>/mod</tt>
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<tt class='indentedcode'>n:abs</tt>
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<tt class='indentedcode'>n:dec</tt>
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<tt class='indentedcode'>n:inc</tt>
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<tt class='indentedcode'>n:limit</tt>
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<tt class='indentedcode'>n:max</tt>
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<tt class='indentedcode'>n:min</tt>
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<tt class='indentedcode'>n:negate</tt>
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<tt class='indentedcode'>n:pow</tt>
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<tt class='indentedcode'>n:sqrt</tt>
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<tt class='indentedcode'>n:square</tt>
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<br/><br/>
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<span class="h2">Conversions</span>
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<br/><br/>
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You can convert a number to a string with <span class="tt">n:to-string</span> or
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to a floating point value with <span class="tt">n:to-float</span>.
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<br/><br/>
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<tt class='indentedcode'>#123 n:to-float f:put</tt>
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<br/><br/>
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<tt class='indentedcode'>#123 n:to-string s:put</tt>
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<br/><br/>
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<span class="h2">Display</span>
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<br/><br/>
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To display a number, use <span class="tt">n:put</span>.
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<br/><br/>
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<tt class='indentedcode'>#123 n:put</tt>
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</p>
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</body></html>
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