Operator -= (Subtract And Assign)
Subtracts and assigns a value to a variable
Declare Operator -= ( ByRef lhs As T1, ByRef rhs As T2 )
Declare Operator -= ( ByRef lhs As T Ptr, ByRef rhs As Integer )
lhs -= rhs
lhs
This operator subtracts and assigns a value to a variable. It is functionally equivalent to:
For numeric types, the right-hand side expression (rhs) will be converted to the left-hand side type (T1).
This operator can be overloaded for user-defined types.
Output:
Syntax
Declare Operator -= ( ByRef lhs As T1, ByRef rhs As T2 )
Declare Operator -= ( ByRef lhs As T Ptr, ByRef rhs As Integer )
Usage
lhs -= rhs
Parameters
lhs
The variable to assign to.
T1Any numeric type.
rhsThe value to subtract from lhs.
T2Any numeric type.
TAny data type.
Description
This operator subtracts and assigns a value to a variable. It is functionally equivalent to:
lhs = lhs - rhs
For numeric types, the right-hand side expression (rhs) will be converted to the left-hand side type (T1).
This operator can be overloaded for user-defined types.
Example
Dim n As Double
n = 6
n -= 2.2
Print n
Sleep
n = 6
n -= 2.2
Print n
Sleep
Output:
3.8
Dialect Differences
- In the -lang qb dialect, this operator cannot be overloaded.
Differences from QB
- New to FreeBASIC
See also
