Imp

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Result = x Imp y

Description

Imp returns the logical implication of two expressions. Logical implication returns TRUE if x implies y. Imp also does a bitwise comparison of two numeric expressions.

Table 13: Logical Implication

x y Implication
True/1 True/1 True/1
True/1 False/0 False/0
False/0 True/1 True/1
False/0 False/0 True/1

Example (Basic)

Rem Imp Example
'Imp preforms logical and bitwise implication
Dim Test1, Test2, Test3, x, y
x = 3
y = 5
Test1 = x < 0 Imp y < 10
Test2 = x > 0 Imp y > 10
Test3 = x < 0 Imp y > 10
Print "Logical:"
Print "  x < 0 Imp y < 10 = " & Test1
Print "  x > 0 Imp y > 10 = " & Test2
Print "  x < 0 Imp y > 10 = " & Test3

Example (JavaScript)

// Imp Example
/* Imp preforms logical and bitwise implication */

Imp = function(x,y) {
  if (x == null && !y) return null;
  if (!x && y == null) return true;
  if (y == null) return null;
  if (!x || x && y) return true;
  return false;
}

var  Test1, Test2, Test3, x, y;
x = 3;
y = 5;
Test1 = Imp(x < 0,y < 10);
Test2 = Imp(x > 0,y > 10);
Test3 = Imp(x < 0,y > 10);
NSB.Print("Logical:")
NSB.Print("  Imp(x < 0,y < 10) = " + Test1);
NSB.Print("  Imp(x > 0,y > 10) = " + Test2);
NSB.Print("  Imp(x < 0,y > 10) = " + Test3);

Output

Logical:
  x < 0 IMP y < 10 = True
  x > 0 IMP y > 10 = False
  x < 0 IMP y > 10 = True

Related Items

And, Eqv, Not, Or, Xor