Practical Python: Learn Python Basics Step by Step- Python 3 - While Loop

The video tutorial explains the use of for and while loops in Python. It begins with an introduction to loops, followed by a detailed explanation of while loops, including a practical example using a counter. The tutorial then compares for and while loops, discussing when to use each type. The key takeaway is that for loops are used when the number of iterations is known, while while loops are used when the condition to continue is external to the loop.

In a while loop, what happens when the condition becomes false?

• The loop skips the next iteration.

• The loop restarts from the beginning.

• The loop stops executing.

• The loop continues indefinitely.

Which of the following is a correct way to increment a counter in a while loop?

• counter = counter - 1

• counter += 1

• counter =+ 1

• counter = counter + 0

What is the role of a counter in a while loop?

• To decrease the number of iterations.

• To keep track of the number of iterations.

• To stop the loop immediately.

• To execute the loop only once.

What is the primary difference between a for loop and a while loop?

• A for loop is used for indefinite iteration.

• A while loop is used when the number of iterations is known.

• A for loop is used when the number of iterations is known.

• A while loop is used for definite iteration.

When should you prefer using a while loop over a for loop?

• When the loop condition is based on an external factor.

• When you know the exact number of iterations.

• When you want to execute a block of code once.

• When you want to iterate over a list.

What is a practical example of using a while loop?

• Executing a block of code a fixed number of times.

• Printing a message a known number of times.

• Iterating over a fixed list of items.

• Reading user input until a specific condition is met.

In the context of loops, what does 'external condition' refer to?

• A condition that is determined outside the loop.

• A condition that is always true.

• A condition that is unrelated to the loop.

• A condition that is checked within the loop.