ugBASIC User Manual

   SWAP var1, var2

The SWAP command is used to swap the values of two variables. In practice, the contents of the first variable are assigned to the second and vice versa, in a single operation.

The SWAP command makes code more concise and readable by avoiding the use of a temporary variable for swapping. Since swapping elements is a fundamental operation in many sorting algorithms, such as bubble sort, it is important that it is an efficient operation. Infact, actually performs a similar operation at the assembly level, more efficiently and hidden from the programmer.

The SWAP operation can only be used with variables of the same bit width (in case of numeric type) or the same type (if strings).

  a = 42 : b = 84
  AT a, b
  PRINT a, b

 Swp

AT

If you have encountered a problem using this command, if you think there is a bug or the explanation is unclear, please open an issue for this keyword on GitHub. Thank you!