IMP Operator

Used to perform a logical implication on two expressions.

Syntax

result = expression1 Imp expression2

The Imp operator syntax has these parts:

Part Description
result Required; any numeric variable.
expression1 Required; any expression.
expression2 Required; any expression.

Remarks

The following table illustrates how result is determined:

If expression1 is And expression2 is The result is
True True True
True False False
False True True
False False True

The Imp operator performs a bitwise comparison of identically positioned bits in two numeric expressions and sets the corresponding bit in result according to the following table:

If expression1 is And expression2 is The result is
0 0 1
0 1 1
1 0 0
1 1 1

Example

Dim A, B, C, D, MyCheck
A = 10: B = 8: C = 6: D = Null   ' Initialize variables.
MyCheck = A > B Imp B > C   ' Returns True.
trace MyCheck
MyCheck = A > B Imp C > B   ' Returns False.
trace MyCheck
MyCheck = B > A Imp C > B   ' Returns True.
trace MyCheck
MyCheck = B > A Imp C > D   ' Returns True.
trace MyCheck
MyCheck = C > D Imp B > A   ' Returns False.
trace MyCheck
MyCheck = B Imp A   ' Returns -1 (bitwise comparison).
trace MyCheck

 

See Also

Operators