Nested IFs can be used.
Here is the complete program:
PRINT "Enter full fare"
INPUT FARE
PRINT "Enter age"
INPUT AGE
'
'Calculate discount based on age
IF AGE < 12 THEN
LET RATE = 0.0
ELSE
IF AGE < 24 THEN
LET RATE = 0.70
ELSE
LET RATE = 1.0
END IF
END IF
'Calculate fare
PRINT "Your fare is:", FARE * RATE
END
A passenger is 21 years old and wants a round-trip ticket to Rome. The full fare is $1000. What does this passenger pay?