File: unless.html

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<html><head><title>unless</title><h1>unless</h1></head><body><code class="scheme">(<code class="scheme"><span class="keyword">unless</span></code> <b>EXPRESSION</b> <b>EXPRESSION</b>)</code><br /> The first expression (known as the "test" expression) is evaluated. If the expression evaluates to false, the result of the <code class="scheme"><span class="keyword">unless</span></code> expression is the result of evaluating the second expression, otherwise the result is void (and the second expression is not evaluated). If the result of evaluating the test expression is neither true nor false, it is an error. <br /><p><a href="index.htm">Advanced Student Language</a></p></body></html>