Question

What is the output of the following codes, consider each case independently. I have an example of Case 1 to show you how to complete each case at the end of this Module.

Case 1: What will be the value of x after the following loop is executed:

x = 0

For i = 1 To 2

For j = 1 To 3

     x = x * i * j

Next j

Next i

Case 2: What will be the value of x after the following loop is executed:

x = 1

For i = 1 To 2

For j = 1 To 3

     x = x * i * j

Next j

Next i

Case 3: What will be the value of x after the following loop is executed:

x = 0

For i = 1 To 2

For j = 1 To 3

     x = x * i + j

Next j

Next i

Case 4: What will be the value of x after the following loop is executed:

x = 0

For i = 1 To 2

For j = 1 To 3

     x = x + i * j

Next j

Next i

Please see below for an example of completed Case 1. Follow the same method to complete the other three cases. Let me know your questions.

x	i	j	NOTES
0			x is initialized to 0
x = 0*1*1, the new value for x is 0	1	1	First we start with the outer loop (for I ) and continue with inner loop (for J ).
x = 0*1*2, the new value for x is 0	1	2	Still in the inner loop when J becomes 2, note I is 1
x = 0*1*3, the new value for x is 0	1	3	Still in the inner loop when J becomes 3, note I is 1
x = 0*2*1, the new value for x is 0	2	1	Here program continues with the outer loop, where I is 2 and moves to inner loop where J is 1
x = 0*2*2, the new value for x is 0	2	2	Program continues with the inner loop when J becomes 2, note I is 2
x = 0*2*3, the new value for x is 0	2	3	Program continues with the inner loop when J becomes 3, note I is 2
X = 0			Is the final value for x when both loops are completed

Answer 1

case 1 is already solved so i start with case 2

Case 2:

x	i	j	NOTES
1			x is initialized to 1
x = 1*1*1, the new value for x is 1	1	1	First we start with the outer loop (for I ) and continue with inner loop (for J ).
x = 1*1*2, the new value for x is 2	1	2	Still in the inner loop when J becomes 2, note I is 1
x = 2*1*3, the new value for x is 6	1	3	Still in the inner loop when J becomes 3, note I is 1
x = 6*2*1, the new value for x is 12	2	1	Here program continues with the outer loop, where I is 2 and moves to inner loop where J is 1
x = 12*2*2, the new value for x is 48	2	2	Program continues with the inner loop when J becomes 2, note I is 2
x = 48*2*3, the new value for x is 288	2	3	Program continues with the inner loop when J becomes 3, note I is 2
X = 288			Is the final value for x when both loops are completed

Case 3:

x	i	j	NOTES
0			x is initialized to 0
x = 0*1+1, the new value for x is 1	1	1	First we start with the outer loop (for I ) and continue with inner loop (for J ).
x = 1*1+2, the new value for x is 3	1	2	Still in the inner loop when J becomes 2, note I is 1
x = 3*1+3, the new value for x is 6	1	3	Still in the inner loop when J becomes 3, note I is 1
x = 6*2+1, the new value for x is 13	2	1	Here program continues with the outer loop, where I is 2 and moves to inner loop where J is 1
x = 13*2+2, the new value for x is 28	2	2	Program continues with the inner loop when J becomes 2, note I is 2
x = 28*2+3, the new value for x is 59	2	3	Program continues with the inner loop when J becomes 3, note I is 2
X = 59			Is the final value for x when both loops are completed

Case 4:

x	i	j	NOTES
0			x is initialized to 0
x = 0+1*1, the new value for x is 1	1	1	First we start with the outer loop (for I ) and continue with inner loop (for J ).
x = 1+1*2, the new value for x is 3	1	2	Still in the inner loop when J becomes 2, note I is 1
x = 3+1*3, the new value for x is 6	1	3	Still in the inner loop when J becomes 3, note I is 1
x = 6+2*1, the new value for x is 8	2	1	Here program continues with the outer loop, where I is 2 and moves to inner loop where J is 1
x = 8+2*2, the new value for x is 12	2	2	Program continues with the inner loop when J becomes 2, note I is 2
x = 12+2*3, the new value for x is 18	2	3	Program continues with the inner loop when J becomes 3, note I is 2
X = 18			Is the final value for x when both loops are completed