JavaScript: Round a number to a specified number of digits and strip extra zeros

Last update on August 19 2022 21:51:51 (UTC/GMT +8 hours)

JavaScript Math: Exercise-24 with Solution

Write a JavaScript function to round a number to a specified number of digits and strip extra zeros (if any).

Test Data :
var a = -4.55555;
console.log(result);
-4.5556
var a = 5.0001000;
console.log(result);
5.0001

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to round a number to a specified number of digitsand strip extra zeros (if any).</title>
</head>
<body>

</body>
</html>

JavaScript Code:

//var a = -1.1230000;
//var a = 0.0000009999999;
//var a = 1.000000000;
//var a = -4.55555;
//var a = 5.0001000;
var a = 1.1234000;

var result = parseFloat(a.toFixed(4));
console.log(result);

Sample Output:

1.1234

Pictorial Presentation:

$JavaScript: Math - Round a number to a specified number of digits and strip extra zeros.$

Live Demo:

See the Pen javascript-math-exercise-24 by w3resource (@w3resource) on CodePen.

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