JavaScript Number: integers, floats, and Math

Andrew Dorokhov schedule 1 min read

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Examples:

let number = 10;
let number = 1.4;

Additional data types:

Working with math:

Math.round();

Useful functions:

const number = parseInt(someString);
const number = parseFloat(someString);
const thisIsNotANumber = isNaN(someVariable);

Tricks

Convert string to number:

const s = '5';
const number = +s;
// or:
const number = +'5';

Number('15');   // We will get a number type.
+'15';          // We will get a number type.

code

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