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  <title>IF</title>
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  <p class="sub">IF [expr] ... end if</p>

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    <p class="section">Description</p>

    <p class="text">Begins a conditional block of code.</p>

    <p class="section">Results</p>

    <p class="text">If [expr] evaluates to true (non-zero) then the
    code following the IF statement is executed. IF sta