JavaScript Swap Two Numbers
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JavaScript Program to Swap Two Numbers
In programming, there are two different techniques to swap any two numbers in a variable, they are
- Swap using Temporary Variable
- Swap without using Temporary Variable
Swap using Temporary Variable
In the following example, we will swap two numbers (25 and 50) using a temporary variable (temp).
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<h1>JS Swap Two Numbers</h1>
<script>
var num1 = 25;
var num2 = 50;
var temp = 0;
document.write("<br>Before Swap, num1 = " +num1+" num2 = "+num2);
temp = num1;
num1 = num2;
num2 = temp;
document.write("<br>After Swap, num1 = " +num1+" num2 = "+num2);
</script>
</body>
</html>
Swap without using Temporary Variable
In the following example, we will swap two numbers (25 and 50) without using a temporary variable.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<h1>JS Swap Two Numbers</h1>
<script>
var num1 = 25;
var num2 = 50;
document.write("<br>Before Swap, num1 = " +num1+" num2 = "+num2);
num1 = num1 - num2;
num2 = num1 + num2;
num1 = num2 - num1;
document.write("<br>After Swap, num1 = " +num1+" num2 = "+num2);
</script>
</body>
</html>
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