Example for IF ... ELSE ... ENDIF

IF A THEN 28

IF I < J GOTO 200+I*J

IF I < 0 GOSUB 9000

IF condition THEN statement [ELSE statement]

or

IF condition THEN [statement1

statement2

...

statementn]

[ELSE

statementn+1

statementn2

...

statementn+m]

ENDIF