SWAP
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Swap the values of two variables.
* Syntax
```sbsyntax
SWAP var1, var2
```
|* Input | Description |
| `var1`, `var2` | The two variables to swap. |
The values of the two variables are swapped in-place. `var1` now has `var2`'s previous value, and vice versa. The index operator may also be used to refer to elements of arrays or strings.
* Examples
```sb4
'swap two variables
VAR A=1
VAR B=2
SWAP A,B
PRINT A,B '2 1
```
```sb4
'swap two array elements in place
DIM ARY[]=[1,2,3]
SWAP ARY[0],ARY[2]
INSPECT ARY
```
```sb4
'swap two characters in a string
VAR A$="ABC"
SWAP A$[0],A$[2]
PRINT A$ 'CBA
```
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