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See also: AT

SWAP

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).

syntax example abbreviation back to keywords

SYNTAX

 SWAP var1, var2


Legend
  • id : identifier
  • type : datatype
  • v : value
  • "..." : string
  • [...] : optional

EXAMPLE

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


ABBREVIATION: Swp

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An interesting competition is held at the beginning of each year: the BASIC 10Liner Contest. It is possible to use ugBASIC to participate in the next "BASIC10Liner" competition, in the following categories:

  • PUR-120 - A game in 10 lines of max 120 characters (w/abbrev.)
  • EXTREME-256 - A game in 10 lines of max 256 characters (w/abbrev.)
  • SCHAU - Any program in 10 lines of max 256 characters (w/abbrev.)
In order to reduce space you can use this abbreviation for this instruction: 

SWAP ↔ Swp

Any problem?

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