Swapsub

Exchanges the values of two variables

Syntax

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

Parameters

Description

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

Since fbc version 1.20.0, because a fixed-length string fields of STRING*N type no longer has a 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)
  
  

Example

' 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

Reference

• Documented in KeyPgSwap.html