Swap the Values of Two Variables in PlayBasic

How To Swap the Values of Two Variables in PlayBasic

PlayBasic has many useful functions. Unlike most BASIC dialects, PlayBasic has a simple way to swap the values of two variables, and more than one function to do it. But first, for the sake of completeness, here's the hard way first.

The Hard Way

Create a 'Temporary' Variable

To swap the values of two variables, you're going to need a third variable. Declare it along with your other variables :

ForceDeclaration

Declaration
    tempVar, var1, var2
EndDeclaration

Swap Out the Values of the Variables

First, make sure you put the value of the first variable in the "temporary" variable.

tempVar = var1

Then, change the first value to the value of the second variable.

var1 = var2

Finally, change the value of the second variable to the "temporary" variable.

var2 = tempVar

Complete Code

ForceDeclaration

Declaration
    tempVar, var1, var2
EndDeclaration

var1 = 1
var2 = 2

tempVar = var1
var1 = var2
var2 = temp

Print "Var1 : " + str$(var1)
Print "Var2 : " + str$(var2)
Sync
WaitKey

Swapping with Swap

If you use the Swap function, you do not need an extra variable.

Swap var1, var2

Complete Code

ForceDeclaration

Declaration
    var1, var2
EndDeclaration

var1 = 1
var2 = 2

Swap var1, var2

Print "Var1 : " + str$(var1)
Print "Var2 : " + str$(var2)
Sync
WaitKey