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

===== IF...THEN...ELSE...ELSEIF...ENDIF ✓ =====

===== SYNTAX =====
     IF expression THEN
        ...
     ELSE
        ...
     ENDIF
     IF expression THEN
        ...
     ELSEIF expression2 THEN
        ...
        ...
     ELSE
        ...
     ENDIF

==== PURPOSE ====


Implement a conditional jump. This implementation assumes that
an expression passed as a parameter is 0 (for false) and not 
zero (for true). In this case, if the expression is zero, it 
jumps directly to the statement following the corresponding 
''ENDIF'' (or ''ELSE'', if present). Otherwise, the following 
code will be executed (up to ''ENDIF'' or ''ELSE'').



==== EXAMPLE ====
    IF ( x == 42 ) THEN : x = 0 : ELSE : x = 1 : ENDIF
    IF ( x == 42 ) THEN : x = 0 : ELSE IF y == 0 THEN : y = 42 : ELSE : x = 1 : ENDIF
    IF ( x == 42 ) THEN
      x = 0
    ELSE IF y == 0 THEN
      y = 42
    ELSE
      x = 1
    ENDIF


See also the following example files:
  * ''[[https://github.com/spotlessmind1975/ugbasic/tree/main/examples/control_returning_01.bas|control_returning_01.bas]]''
  * ''[[https://github.com/spotlessmind1975/ugbasic/tree/main/examples/control_returning_02.bas|control_returning_02.bas]]''
  * ''[[https://github.com/spotlessmind1975/ugbasic/tree/main/examples/control_popping_91.bas|control_popping_91.bas]]''


==== ABBREVIATION ====
   If...Th...El...Eif...Ei


==== 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


==== 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 IF...THEN...ELSE...ELSEIF...ENDIF|open an issue]] for this keyword on GitHub. Thank you!===== POWERED BY =====

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