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

JavaScript Math: Exercise-24 with Solution

Round and Strip Extra Zeros

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:

JavaScript Code:

// Declare a variable named a and assign it a floating-point number value with trailing zeros.
// var a = -1.1230000;
// var a = 0.0000009999999;
// var a = 1.000000000;
// var a = -4.55555;
// var a = 5.0001000;
var a = 1.1234000;

// Round the value of 'a' to 4 decimal places and convert it to a floating-point number.
var result = parseFloat(a.toFixed(4));

// Output the result to the console.
console.log(result);

Output:

1.1234

Visual Presentation:

Live Demo:

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

For more Practice: Solve these Related Problems:

• Write a JavaScript function that rounds a number to a specified number of digits and removes trailing zeros using regex.
• Write a JavaScript function that formats a number to fixed decimals then strips redundant zeros, returning a clean numeric string.
• Write a JavaScript function that rounds a number and converts it to a string without unnecessary decimal points.
• Write a JavaScript function that handles both positive and negative numbers while rounding and stripping extra zeros.

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