Function sign
Compute the sign of a value. The sign of a value x is:
- 1 when x > 1
- -1 when x < 0
- 0 when x == 0
For matrices, the function is evaluated element wise.
Syntax
sign(x)
Parameters
| Parameter | Type | Description |
|---|---|---|
x |
number | BigNumber | Fraction | Complex | Array | Matrix | Unit | The number for which to determine the sign |
Returns
| Type | Description |
|---|---|
| number | BigNumber | Fraction | Complex | Array | Matrix | Unit | e The sign of x |
Examples
sign(3.5); // returns 1
sign(-4.2); // returns -1
sign(0); // returns 0
sign([3, 5, -2, 0, 2]); // returns [1, 1, -1, 0, 1]