Question

7 what will the follo ng program print when run?
for i in range(2):
x = 3
while x >= 1:
print (x)
x = x - 1
a. 3
2
1
0
3
2
1
0
b. 3
2
1
3
2
1
c. 1
2
3
1
2
3
d. 0
1
2
3

Explanation:

Step1: Analyze the for loop

The for i in range(2) loop runs 2 times.

Step2: Analyze the while loop in each iteration

• In each iteration of the for loop, x is set to 3.
• Then the while x >= 1 loop runs:
• First iteration of while: x = 3, print 3, then x=x - 1=2.
• Second iteration of while: x = 2, print 2, then x=x - 1=1.
• Third iteration of while: x = 1, print 1, then x=x - 1=0.
• Now x = 0 which makes the while loop condition False and exits the while loop.
• Since the for loop runs 2 times, the sequence 3 2 1 is printed twice.

So the output is 3, 2, 1, 3, 2, 1 which corresponds to option B.

Answer:

B. 3
2
1
3
2
1