# - (negate)

operator

Syntax
```(- | negate) numeric-expression
```

Purpose

Use - to change the sign of any numeric-expression. If the numeric-expression is positive, then the result is negative. If applied to a negative expression, the value becomes positive.

You use - as a unary operator (an operator with only one argument), to reverse the sign of a numeric expression.

Note: There should not be a space between the unary - and its argument:

If you negate the value of a BCD number, you must have imported "ombcd.xmd" in your program. If you negate the value of a floating point number, you must have import "omfloat.xmd" in your program. For BCD and floating point numbers, overflow and underflow values will return infinity and zero, respectively.

```  process
local integer foo initial {9}
local integer bar initial {7}

output "Calculating ' - (9 + -7)' = "
|| "d" % - (foo + -bar)
|| "%n"
; displays "Calculating ' - (9 + -7)' = -2"
```

This does not change the absolute value of the numeric-expression.

Use the punctuative form ( - ) rather than the keyword `negate`.

Usage examples:

```  -432
-("4987" + 315 * 12)
- "3" > "04"
negate "3" > "04"
```

BCD example:

```  import "ombcd.xmd" unprefixed
process
local bcd foo initial {23}
local bcd bar
set bar to -foo
output "foo = "
|| "d" % foo
|| "%n"
output "bar = "
|| "d" % bar
|| "%n"
; Output: foo = 23
;         bar = -23
```