@nataliapc/mcp-openmsx/resources/programming/basic_wiki/SGN().md

Model context protocol server for openMSX automation and control

# SGN()

## Effect

Returns the sign (positive of negative) of a variable.

## Syntax

`SGN (<Expression>)`

## Parameter

`<Expression>` can be a value, a numeric variable or an mathematical expression.

## Example

```basic
10 PRINT "The sign of -7 is ";SGN(-7)
20 PRINT "The sign of 0 is ";SGN(0)
30 PRINT "The sign of 7 is ";SGN(7)
 
RUN
The sign of -7 is -1
The sign of 0 is 0
The sign of 7 is 1
```

## Related to

`ABS()`, `FIX()`, `INT()`

## Compatibility

MSX-BASIC 1.0 or higher

## Source

Retrieved from "https://www.msx.org/wiki/SGN()"