Operator += (Add And Assign)
Adds and assigns a value to a variable
Syntax
`
Declare Operator += ( ByRef lhs As T1, ByRef rhs As T2 )
Declare Operator += ( ByRef lhs As T Ptr, ByRef rhs As Integer )
Declare Operator += ( ByRef lhs As String, ByRef rhs As String )
Declare Operator += ( ByRef lhs As WString, ByRef rhs As WString )
`
Usage
`
lhs += rhs
`
Parameters
`lhs`
The variable to assign to.
`T1`
Any numeric type.
`rhs`
The value to add to `lhs`.
`T2`
Any numeric type.
`T`
Any data type.
Description
This operator adds 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`).
For string types, this operator is functionally equivalent to `Operator &= (Concatenate And Assign)`.
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.
Example
`
Dim n As Double
n = 6
n += 1
Print n
Sleep
`
Output:

    7

Dialect Differences

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

Differences from QB

- New to FreeBASIC

See also

- `Operator + (Add)`
- Mathematical Functions