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How to write a JavaScript function to get the difference between two numbers?
Use Math.abs() inside a JavaScript function to get the difference between two numbers in JavaScript. The Math.abs() method returns the absolute value, ensuring you always get a positive difference regardless of which number is larger.
Syntax
function getDifference(num1, num2) {
return Math.abs(num1 - num2);
}
Example: Using Math.abs() for Difference
You can try to run the following code to get the difference of numbers:
<html>
<head>
<script>
var num1, num2;
num1 = 50;
num2 = 35;
var difference = function (num1, num2){
return Math.abs(num1 - num2);
}
document.write("Difference = "+difference(num1,num2));
</script>
</head>
<body></body>
</html>
Difference = 15
Multiple Examples
<html>
<head>
<script>
function getDifference(a, b) {
return Math.abs(a - b);
}
document.write("50 - 35 = " + getDifference(50, 35) + "<br>");
document.write("10 - 25 = " + getDifference(10, 25) + "<br>");
document.write("100 - 100 = " + getDifference(100, 100));
</script>
</head>
<body></body>
</html>
50 - 35 = 15 10 - 25 = 15 100 - 100 = 0
Why Use Math.abs()?
Without Math.abs(), subtracting a larger number from a smaller one gives a negative result. The absolute value ensures you always get the positive difference:
<html>
<head>
<script>
document.write("Without Math.abs(): 10 - 25 = " + (10 - 25) + "<br>");
document.write("With Math.abs(): 10 - 25 = " + Math.abs(10 - 25));
</script>
</head>
<body></body>
</html>
Without Math.abs(): 10 - 25 = -15 With Math.abs(): 10 - 25 = 15
Conclusion
Use Math.abs(num1 - num2) to calculate the difference between two numbers. This ensures you always get a positive result regardless of the order of the numbers.
Updated on: 2026-03-15T21:56:04+05:30
9K+ Views
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