Python While Loop GATE Questions with Answers

Python While Loop – Top 10 GATE CSE Questions with Answers

While Loop is very important for GATE CSE 2026 and Data Structure interviews. Let’s cover it with PYQ.

What is While Loop in Python?

While loop executes a block of code as long as condition is True.

i = 0
while i < 3:
    print(i)
    i += 1

For vs While Loop – GATE Point

For Loop: When iteration count is known.
While Loop: When condition based looping is needed.

GATE PYQ on While Loop

Q1. What is output?

x = 5
while x > 0:
    print(x)
    x -= 2

Ans: 5, 3, 1

Q2. Infinite Loop GATE Question 2021

while True:
    print("GATE")

Ans: Infinite loop. To stop use break statement.

Time Complexity

While loop same as for loop – O(n) if runs n times. If nested O(n^2)

Conclusion

Practice while loop PYQ daily. Next post: Python List vs Tuple.