====== SWAP ======

[pet] [vic20] [c64] [c16] [cplus4] [c128] [x16] [m65]

The ''SWAP'' command is used to exchange the values of two variables.

===== Syntax =====

  SWAP <left>, <right>

After the operation, the variable //left// will have the value of //right// and vice versa.

<adm warning>
The two variables can be of any type, but their types must be the same.
</adm>

===== Example =====

The ''SWAP'' command is especially useful in sorting algorithms:

  REM -- Bubble sort 10 random long numbers --
  
  CONST TRUE = 255
  CONST FALSE = 0
  
  DIM nums(10) AS LONG
  DIM swapped AS BYTE FAST
  DIM i AS BYTE FAST
  DIM j AS BYTE FAST
  
  RANDOMIZE TI()
  FOR i = 0 TO 9 : nums(i) = RNDL() : NEXT
  
  swapped = FALSE
  FOR i = 0 TO 8
      FOR j = 0 TO 8 - i
          IF nums(j) > nums(j + 1) THEN
            SWAP nums(j), nums(j + 1)
            swapped = TRUE
          END IF
      NEXT j
      IF swapped = FALSE THEN EXIT FOR
  NEXT i
  
  FOR i = 1 TO 9 : PRINT nums(i) : NEXT