Handout #1

An example of Nested IF statements:

    Get x
    IF (x >= 0)
        THEN IF (x < 50)
                 THEN PUT "F"
                 ELSE IF (x < 60)
                          THEN PUT "D"
                          ELSE IF (x < 70)
                                   THEN PUT "C"
                                   ELSE IF (X < 80)
                                            THEN PUT "B"
                                            ELSE IF (x <= 100)
                                                     THEN PUT "A"
                                                     ELSE PUT "ERROR: x > 100"
                                                 END IF
                                        END IF
                               END IF
                       END IF
             END IF
	ELSE PUT "ERROR: x < 0"
    END IF


Note:
	1) This is more efficient in 2 ways from the previous algorithm
		- only checks one side of the condition - the other
		  side is implicit if you reach this point
		- exits after you reach a true condition

	2) Use of indentation - "correct" but hard to read and see meaning