RangeError: radix must be an integer


RangeError: radix must be an integer at least 2 and no greater than 36 (Firefox)
RangeError: toString() radix argument must be between 2 and 36 (Chrome)

Error type


What went wrong?

The optional radix parameter with the Number.prototype.toString() method has been used. This parameter must be an integer (a number) between 2 and 36 specifying the base of the number system to be used for representing numeric values.

Why is it limited to 36? A radix that is larger than 10 uses alphabetical characters as digits. Therefore, the radix can not be larger than 36 as the Latin alphabet has 26 characters only.

You probably want to use one of the common radices:


Invalid cases

// You cannot use a string like this for formatting:

Valid cases

(42).toString(2);     // "101010" (binary)
(13).toString(8);     // "15"     (octal)
(0x42).toString(10);  // "66"     (decimal)
(100000).toString(16) // "186a0"  (hexadecimal)

See also


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Errors JavaScript RangeError