Javascript Working With Numbers Tutorial

Javascript Working With Numbers

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In this code snippet, we’ll check out some of the Math class functions in Javascript.

More information about all the functions and constants here.

Let’s see the code example below.

Code:

//You can get constants from the Math class. 
let pi = Math.PI;

//Display a certain amount of decimal places.
console.log(pi);
console.log(pi.toPrecision(3)); 

//Round number.
console.log(Math.round(pi));
//Round up.
console.log(Math.ceil(pi));
//Round down.
console.log(Math.floor(pi));
//Get the absolute value of a number.
console.log(Math.abs(-10));

//Do exponentiation. 2^8
console.log(Math.pow(2,8));
//Get squre root of a number.
console.log(Math.sqrt(9));
//Gets base 2 log of 256.
console.log( (Math.log(256)/Math.log(2)) );

//Trigonometric functions.
console.log(Math.sin(90));
console.log(Math.cos(90))