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ABAP Keyword Documentation →  ABAP − Reference →  Program Flow Logic →  Expressions and Functions for Conditions →  log_exp - Logical Expressions →  log_exp - Boolean Operators and Parentheses 

log_exp - EQUIV

Other versions: 7.31 | 7.40 | 7.54

Syntax


... log_exp1 EQUIV log_exp2 ...

Effect

Joining two logical expressions log_exp with EQUIV produces a new logical expression which is true if both expressions are true or both expressions are false. If one of the expressions is true and the other one is false, the join is false.

Within a parenthesis level, only two logical expressions can be joined using EQUIV.


Notes

  • The operator EQUIV is a weaker join than NOT, AND, and OR.

  • The operator EQUIV implements an equivalence join. Negating a join like this using NOT is the same as using an XOR join (eXclusive OR). It is true if one of the expressions is true and the other one is false.


Example

The condition in the IF statement is true if o1, o2, and o3, o4 are either both equal or both unequal pair-wise.

DATA: o1 TYPE i, 
      o2 TYPE i, 
      o3 TYPE i, 
      o4 TYPE i. 

... 

IF o1 = o2 EQUIV o3 = o4. 
  ... 
ENDIF.