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<html><head><title>if</title><h1>if</h1></head><body><code class="scheme"><span class="keyword">if</span></code> (<b>EXPRESSION</b>) <b>STATEMENT</b>  <code class="scheme"><span class="keyword">else</span></code> <b>STATEMENT</b><br /> In this statement the expression should have a boolean type. It is evaluated first. If the expression evaluates to true, then the first statement (known as the then clause) is evaluated. If the expression evaluates to false, the statement following <code class="scheme"><span class="keyword">else</span></code> (the else clause) is evaluated. <br /><p><a href="index.htm">ProfessorJ Intermediate Language</a></p></body></html>