Number.parseInt()

The Number.parseInt() method parses a string argument and returns an integer of the specified radix or base.

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Syntax

Number.parseInt(string,[ radix])

Parameters

Return value

An integer parsed from the given string.

If the radix is smaller than 2 or bigger than 36, and the first non-whitespace character cannot be converted to a number, NaN is returned.

Polyfill

if (Number.parseInt === undefined) {
    Number.parseInt = window.parseInt
}

Examples

Number.parseInt vs parseInt

This method has the same functionality as the global parseInt() function:

Number.parseInt === parseInt // true

and is part of ECMAScript 2015 (its purpose is modularization of globals). Please see parseInt() for more detail and examples.

Specifications

Browser compatibility

See also

• The Number object it belongs to.
• The global parseInt() method.