– Unary negative operator

– Unary negative operator

Reverses the sign of a numeric expression. Do not confuse this operator with the subtraction operator that subtracts one expression from another.

Syntax
- expression 
expression

An expression whose value is numeric.

Example

If you supply a negative value for the variable fx, the r-uneg.p procedure uses the unary negative operator (-) to reverse the sign of fx, producing the absolute value of fx (fabs-x).
r-uneg.p
DEFINE VARIABLE fx     AS DECIMAL NO-UNDO LABEL "X". 
DEFINE VARIABLE fabs-x AS DECIMAL NO-UNDO LABEL "ABS(X)". 
REPEAT: 
  SET fx. 
  IF fx < 0 THEN 
    fabs-x = -fx. 
  ELSE  
    fabs-x = fx. 
  DISPLAY fabs-x. 
END. 
See also

+ Unary positive operator

- `expression`

r-uneg.p
DEFINE VARIABLE fx AS DECIMAL NO-UNDO LABEL "X". DEFINE VARIABLE fabs-x AS DECIMAL NO-UNDO LABEL "ABS(X)". REPEAT: SET fx. IF fx < 0 THEN fabs-x = -fx. ELSE fabs-x = fx. DISPLAY fabs-x. END.

OpenEdge Release 10.2B