Evaluates the code between IF and ENDIF if the comparision of a#$ and b#$ is TRUE. If not, the code between ELSE and ENDIF is evaluated if ELSE is used.
You can use the command THEN if you only want one command to be executed if the comparision is TRUE.
Sample:
a=5; b=3
IF a < b PRINT “a < b”, 100, 100 ELSE PRINT “a < b is FALSE”, 100, 100 ENDIF