The **SGN** function returns the sign of a number value.

## Syntax

sign% = SGN(value)

- Returns -1 when a sign is negative, 0 when a value is zero, or 1 when a value is positive.
- Function is used to store the original sign of a number.
**QB64**allows programs to return only _UNSIGNED variable values using a _DEFINE statement.

## Example(s)

Checking and changing negative values to positive ones.

```
n = -100
IF SGN(n) = -1 THEN n = ABS(n)
PRINT n
```

```
100
```