Or

or performs a logical 'or' between two boolean values.

Syntax

  EXP_NUM1 or EXP_NUM2
  EXP_NUM1 | EXP_NUM2

• EXP_NUM1 and EXP_NUM2 are two numeric values. Any value that is not null is considered as true, while any null value is considered as false.

Examples

CODECODE CODE 
   # Test : does I=1 or J=2 ?
   If I = 1 or J = 2
     CONDITION_RESULT="the condition is true"
   Else
     CONDITION_RESULT="the condition is false"
   Endif
  # Loop as long as integers I or J are non-null, avoiding an infinite loop.
   If I < 0 or J < 0
       Return
   Else
     While I and J
       I -= 1 : J -= 1          :# Decrement I and J
     Wend
   Endif

Description and comments

or returns a boolean result that is 0 or 1, 0 being the value false and 1 to value true.
The result depends on the value of the following table:

Value of EXP_NUM1	Value of EXP_NUM2	Value of (EXP_NUM1 or EXP_NUM2)
false (0)	false (0)	0 (false).
false (0)	true (not equal to 0)	1 (true).
true (not equal to 0)	false (0)	1 (true).
true (not equal to 0)	true (not equal to 0)	1 (true).

Comments:

• or can be abbreviated as |.
• When an expression is made with several subexpressions associated with an and, the first expression is evaluated first; if true, the next expression is not evaluated, and the result returns immediately true. This allows writing code such as the following example:

  # Returns 1 if a not zero default value is given, otherwise evaluate a formula to verify a not zero value
  Funprog GET_VALUE(MY_FORMULA,DEFAULT_VALUE)
  Value Char MY_FORMULA()
  Value Integer DEFAULT_VALUE
  If DEFAULT_VALUE<>0 or evalue(MY_FORMULA)))<>0
    End 1
  Endif
End 0

Associated errors

Error	Description
10	Arguments are not numeric.

See also

and, xor, not.