Operator -= (Subtract And Assign)operator

Subtracts and assigns a value to a variable

Operatorsoperatordocumented

Syntax

Declare Operator -= ( ByRef lhs As T1, ByRef rhs As T2 )

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

Parameters

Name		Description
`lhs`		The variable to assign to.
`T1`		Any numeric type.
`rhs`		The value to subtract from
`lhs`		.
`T2`		Any numeric type.
`T`		Any 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 as a member Operator using the appropriate syntax.

Note: Similarly to the operator '=[>]' (assign), the alternative symbol '-=>' can be also used.

Remarks

Usage



lhs -= rhs

Dialect Differences

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

Differences from QB

New to FreeBASIC

Example

Dim n As Double

n = 6

n -= 2.2

Print n

Sleep

Output:

3.8

Reference

Documented in KeyPgOpCombineSub.html