Declare Operator - ( ByRef lhs As Integer, ByRef rhs As Integer ) As Integer
Declare Operator - ( ByRef lhs As UInteger, ByRef rhs As UInteger ) As UInteger
Declare Operator - ( ByRef lhs As LongInt, ByRef rhs As LongInt ) As LongInt
Declare Operator - ( ByRef lhs As ULongInt, ByRef rhs As ULongInt ) As ULongInt

Declare Operator - ( ByRef lhs As Single, ByRef rhs As Single ) As Single
Declare Operator - ( ByRef lhs As Double, ByRef rhs As Double ) As Double

Declare Operator - ( ByRef lhs As T Pointer, ByRef rhs As T Pointer ) As Integer
Declare Operator - ( ByRef lhs As T Pointer, ByRef rhs As Integer ) As T Pointer

Declare Operator - ( ByRef lhs As T, ByRef rhs As T ) As Integer
Declare Operator - ( ByRef lhs As T, ByRef rhs As Integer ) As T
Declare Operator - ( ByRef lhs As Integer, ByRef rhs As T ) As T

result = lhs - rhs

lhs
rhs
T

Returns the subtraction of two expressions.

When the left and right-hand side expressions are numeric values, Operator - (Subtract) returns the subtraction of the two values.

If the left and right-hand side expressions are both of the T Pointer type, for some type T, the operator performs pointer subtraction on the address, returning the result. This is different from numeric subtraction because the difference is divided by SizeOf( T ).

If an integral value n is subtracted from a T Pointer type, the operator performs pointer arithmetic on the address, returning the memory position of a T value, n indices before (assuming (-n) is within bounds of a contiguous array of T values). This behaves differently from numeric subtraction, because the Integer value is scaled by SizeOf( T ).

Neither operand is modified in any way.

This operator can be overloaded to accept user-defined types.

Dim n As Single
n = 4 - 5
Print n

will produce the output:

-1

• In the -lang qb dialect, this operator cannot be overloaded.
  
  

• None
  
  

• Mathematical Functions