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  <title>Swap two numbers temp example</title>
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  <h1>Swap in-place using temp</h1>
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  <script>!function(){var n=5,t=10,e=[];e.push("Before swapping: num1 = "+n+", num2 = "+t);var u=n;n=t,t=u,e.push("After swapping: num1 = "+n+", num2 = "+t),document.getElementById("out").textContent=e.join("\n")}()</script>
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JavaScript Swap Two Numbers — Temp Variable (Try It)