File: set33.html

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<html><head><title>set!</title><h1>set!</h1></head><body><code class="scheme">(<code class="scheme"><span class="keyword">set!</span></code> <b>NAME</b> <b>EXPRESSION</b>)</code><br /> A <code class="scheme"><span class="keyword">set!</span></code> expression contains a name and an expression. The <nonterm>NAME</nonterm> must one that is <code class="scheme"><span class="keyword">define</span></code>d or bound by <code class="scheme"><span class="keyword">letrec</span></code>, <code class="scheme"><span class="keyword">let</span></code>, or <code class="scheme"><span class="keyword">let*</span></code>. The <code class="scheme"><span class="keyword">set!</span></code> expression first evaluates the sub-expression and then changes the binding of the name so that it refers to the value of the expression. <br /><p><a href="index.htm">Advanced Student Language</a></p></body></html>