Operator += (Add and Assign)

• Source: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgOpCombineAdd
• Last revised: 2019-09-27

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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.

Examples

start GeSHi

Dim n As Double
n = 6
n += 1
Print n
Sleep

end GeSHi

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

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