Function sign

sign(value: number): number
Returns the sign of a number: -1, 0, or 1.
Parameters
- value: number
  The number whose sign is to be determined.
Returns number
-1 if the number is negative, 1 if positive, and 0 if zero.
Example
```
sign(42);    // returns 1
sign(-42);   // returns -1
sign(0);     // returns 0
```
- Defined in sign/sign.ts:14