IMP (Imply)
The IMP operator is used to perform a logical implication on two expressions.
Syntax
Result = expression1 IMP expression2
Example
'The following program shows the values returned by the IMP operator under different scenarios.
Public A = 10, B = 8, C = 6 , Result(4) as Boolean
BeginProg
Result(1) = A > B Imp B > C 'returns true
Result(2) = B > A Imp B > C 'returns true
Result(3) = A > B Imp C > A 'returns false
Result(4) = B > A Imp C > B 'returns true
EndProg
Remarks
The following table illustrates how Result is determined:
| If expression1 is | And expression2 is | The Result is |
|---|---|---|
| True | True | True |
| True | False | False |
| True | Null | Null |
| False | True | True |
| False | False | True |
| False | Null | True |
| Null | True | True |
| Null | False | Null |
| Null | Null | Null |
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 Bit in expression1 is |
And Bit in expression2 is |
The Result is |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |