BASIC Programming/Beginning BASIC/Control Structures/IF...THEN...ELSEIF...ELSE

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The IF...THEN...ELSEIF...ELSE control statement allows identifing if a certain condition is true, and executes a block of code if it is the case.

IF number<0 THEN
  PRINT "Number is negative"
ELSEIF number>0 THEN
  PRINT "Number is positive"
ELSE
  PRINT "Number is zero"
END IF