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====== ugBASIC User Manual ======

===== SELECT CASE...CASE...CASE ELSE...ENDSELECT ✓ =====

===== SYNTAX =====
     SELECT CASE expression
        CASE value1:
           ...
        CASE value2:
           ...
        ...
        [ CASE ELSE ]
           ...
     ENDSELECT

==== PURPOSE ====


The ''SELECT CASE'' command is part of the ''SELECT CASE...END SELECT'' structure.
It allows you to execute different blocks of code depending on the value of a
variable or expression. In practice, it is like having a series of "cases" and 
the program executes the code corresponding to the case that occurs.

The ''expression'' is evaluated at the beginning of the control block,
and its value is compared to the values specified in the cases.
Each ''CASE'' represents a possible value or a range of values
of the expression. Inside each case, you insert the instructions that 
will be executed if the value of the expression matches that case.
The ''CASE ELSE'' is optional, and it is executed if no previous 
case is true. In 8-bit computers, the semantics of ''SELECT CASE'' are
closely tied to data representation. Because registers and variables were 
often limited to 8 bits, the values that could be compared in cases are
integers between 0 and 255, also if ugBASIC supports any integer type
Anyway, it allows the expression to be compared to any integer value but,
due to the 8-bit limitation, the range of values that could be 
compared should be limited, to be effective, in terms of performances. 

Using ''SELECT CASE'' makes code clearer and easier to understand 
than a series of nested ''IF...THEN...ELSE'' statements. It can
be more efficient than a series of ''IF...THEN...ELSE'' statements.



==== EXAMPLE ====
    SELECT CASE number
      CASE 1
         PRINT "one!"
      CASE 2
         PRINT "two!"
      CASE ELSE
         PRINT "neither!"
    ENDSELCT


See also the following example files:
  * ''[[https://github.com/spotlessmind1975/ugbasic/tree/main/examples/control_case_01.bas|control_case_01.bas]]''


==== ABBREVIATION ====
   SlCsCsCsElEs


==== AVAILABLE ON ====
  * 
  * Atari (400/800)
  * Atari XL/XE
  * Commodore 128 (MOS 8502)
  * Commodore 128 (Zilog Z80)
  * Commodore 64
  * Commodore 64+REU
  * TRS-80 Color Computer
  * TRS-80 Color Computer 3
  * ColecoVision
  * Amstrad CPC 664
  * Dragon 32
  * Dragon 64
  * Thomson MO5
  * Thomson MO5
  * Olivetti Prodest PC128
  * Commodore PLUS/4
  * SEGA SC-3000
  * SEGA SG-1000
  * 
  * VG-5000
  * Commodore VIC-20
  * ZX Spectrum 48


==== SEE ALSO ====
[[CASE]] [[CASE ELSE]] [[ENDSELECT]] 

==== ANY PROBLEM? ====
If you have encountered a problem using this command, if you think there is a bug or the explanation is unclear, please [[https://github.com/spotlessmind1975/ugbasic/issues/new?title=ISSUE ON SELECT CASE...CASE...CASE ELSE...ENDSELECT|open an issue]] for this keyword on GitHub. Thank you!===== POWERED BY =====

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