Encyclopedia Number.prototype.toString.md

Number.prototype.toString()

The toString() method returns a string representing the specified Number object.

The Number object overrides the toString() method of the Object object; it does not inherit Object.prototype.toString(). For Number objects, the toString() method returns a string representation of the object in the specified radix.

Syntax

numObj.toString([radix])

Values

If the radix is not specified, the preferred radix is assumed to be 10 and When the numObj is not a whole number, the 'dot' sign is used to separate the decimal places.

var count = 10;
console.log(count.toString());    // displays '10'
console.log((17).toString());     // displays '17'
console.log((17.2).toString());   // displays '17.2'

The toString() method parses its first argument, and attempts to return a string representation in the specified radix (base). For radixes above 10, the letters of the alphabet indicate numerals greater than 9. For example, for hexadecimal numbers (base 16), a through f are used.

var x = 6;
console.log(x.toString(2));       // displays '110'
console.log((254).toString(16));  // displays 'fe'

If the numObj is negative, the sign is preserved. This is the case even if the radix is 2; the string returned is the positive binary representation of the numObj preceded by a - sign, not the two's complement of the numObj.

console.log((-10).toString(2));   // displays '-1010'
console.log((-0xff).toString(2)); // displays '-11111111'

Browser Support

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