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Math And Rounding In JavaScript
JavaScript provides several built-in methods for performing mathematical operations and rounding numbers.
Here are some of the most commonly used mathematical operations in JavaScript:
- Addition:
+ - Subtraction:
- - Multiplication:
* - Division:
/ - Remainder (modulo):
%
To round numbers in JavaScript, you can use the Math.round() method, which rounds a number to the nearest integer:
Code For Math.round() Method In JS
let num = 4.6;
let result = Math.round(num);
console.log(result);
Output
5
You can also use the Math.floor() method to round a number down to the nearest integer:
Code For Math.floor() Method In JS
let num = 4.6;
let result = Math.floor(num);
console.log(result);
Output
4
And the Math.ceil() method to round a number up to the nearest integer:
Code For Math.ceil() Method In JS
let num = 4.1;
let result = Math.ceil(num);
console.log(result);
Output
5
For more specific rounding, you can use the .toFixed() method on a number. This method returns a string representation of the number rounded to a specified number of decimal places:
Code For toFixed() Method In JS
let num = 4.666666;
let result = num.toFixed(2);
console.log(result);
Output
“4.67”
You can learn more about them in the official documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math
Conclusion
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