IF checks the truth value of a condition, which is described by a formula. If the truth value is true then the condition is satisfied and the following operation is executed. If the truth value is false then the following operation is skipped. Further conditions can be expressed with ELSE, whose truth value is checked afterwards.
ENDIF ends the control structure.
(*{IF $Group="Cyclic"}*) true
(*{ELSE}*) false
(*{END_IF}*)
oder:
(*{IF $Group="Cyclic"}*) true
(*{END_IF}*)