Operator Subtract and Assign

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Operator -= (Subtract And Assign)

Subtracts 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 )

Parameters

• lhs
• T1
• rhs
• lhs
• T2
• T

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

See also

• Operator - (Subtract)
• Mathematical Functions

Examples

Dim n As Double

n = 6

n -= 2.2

Print n

Sleep

Output:

3.8

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Category: Operators
Kind: operator

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Reproduced from the FreeBASIC Wiki Manual under the GNU Free Documentation License 1.3 — with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. Copyright © the FreeBASIC project and wiki contributors. See License.