Number.prototype.toString ( [ radix ] )

NOTEThe optional?radix?should be an integer value in the inclusive range?2?to?36. If?radix?not present or is?undefined?the Number?10?is used as the value of?radix.

The following steps are performed:

1. Let?x?be thisNumberValue(this?value).

2. ReturnIfAbrupt(x).

3. If?radix?is not present, let?radixNumber?be 10.

4. Else if?radix?is?undefined, let?radixNumber?be 10.

5. Else let?radixNumber?be?ToInteger(radix).

6. ReturnIfAbrupt(radixNumber).

7. If?radixNumber?< 2 or?radixNumber?> 36, throw a?RangeError?exception.

8. If?radixNumber?= 10, return?ToString(x).

9. Return the String representation of this Number value using the radix specified by?radixNumber. Letters?a-z?are used for digits with values 10 through 35. The precise algorithm is implementation-dependent, however the algorithm should be a generalization of that specified in?7.1.12.1.

The?toString?function is not generic; it throws a?TypeError?exception if its?this?value is not a Number or a Number object. Therefore, it cannot be transferred to other kinds of objects for use as a method.