Swap

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Swap

Exchanges the values of two variables.

Syntax

Declare Sub Swap ( ByRef a As Any, ByRef b As Any )

Parameters

• a
• b

Description

Swaps the value of two variables, including UDT instances (swaps all data members).

Because a fixed-length string field of STRING*N type has no terminal null character, Swap will pad values with spaces where one of the arguments is of the STRING*N type.

Note: When the data are referenced by a pointer, alone or within a descriptive structure (a UDT, for example), Swap only exchanges the values of the pointers or the contents of the descriptive structures without accessing data themselves. For var-len strings, Swap only exchanges the descriptors of the strings rather than reallocate memory for exchange all strings data characters.
For UDTs, Swap simply exchanges the contents of the structures, without any operators or methods being called.

Remarks

Usage

Swap a, b

Differences from QB

• None

See also

• Operator = (Assignment)

Examples

' using swap to order 2 numbers:

Dim a As Integer, b As Integer

Input "input a number: "; a

Input "input another number: "; b

If a > b Then Swap a, b

Print "the numbers, in ascending order are:"

Print a, b

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Category: Memory Functions
Kind: sub

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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.