Course Content

Python Loops

1. While Loops: Get Started

Simple While Loop Challenge 1 Challenge 2

2. While Loops: Essentials

Infinite Loops Challenge Break Continue Else Challenge

3. For Loops

Simple For Loops range()enumerate()zip()

4. Nested Loops

Nested Loops Break and Continue with Nested Loops Challenge

Infinite Loops

Here is the question: what if the condition always has a constant value of True or False? If it is False, we simply skip the instructions inside the loop's body. But for True, we get the infinite loop: you'll never leave it, and your code can execute without stopping (or until the process will be interrupted). Beginners (and even experienced programmers) sometimes accidentally code the infinite loops due to different reasons.

For example, the following code snippet is an infinite loop because the counter i is constant, probably, the programmer forgot about updating counter i += 1.


              123
            
i = 1
while i < 100:
  print(i*i)

This loop is infinite because the stop condition is constantly True.


              12
            
while 2 + 2 == 4:
  print('Math works!')

You should avoid the infinite loops and double check if the condition ever becomes False.

Task

Be careful, this loop is infinite. Change the condition so that the loop is finite and list_ contains following values:

1 2 4 8 16 32 64

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 1

Infinite Loops

For example, the following code snippet is an infinite loop because the counter i is constant, probably, the programmer forgot about updating counter i += 1.


              123
            
i = 1
while i < 100:
  print(i*i)

This loop is infinite because the stop condition is constantly True.


              12
            
while 2 + 2 == 4:
  print('Math works!')

You should avoid the infinite loops and double check if the condition ever becomes False.

Task

Be careful, this loop is infinite. Change the condition so that the loop is finite and list_ contains following values:

1 2 4 8 16 32 64

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 1

Infinite Loops

For example, the following code snippet is an infinite loop because the counter i is constant, probably, the programmer forgot about updating counter i += 1.


              123
            
i = 1
while i < 100:
  print(i*i)

This loop is infinite because the stop condition is constantly True.


              12
            
while 2 + 2 == 4:
  print('Math works!')

You should avoid the infinite loops and double check if the condition ever becomes False.

Task

Be careful, this loop is infinite. Change the condition so that the loop is finite and list_ contains following values:

1 2 4 8 16 32 64

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

For example, the following code snippet is an infinite loop because the counter i is constant, probably, the programmer forgot about updating counter i += 1.


              123
            
i = 1
while i < 100:
  print(i*i)

This loop is infinite because the stop condition is constantly True.


              12
            
while 2 + 2 == 4:
  print('Math works!')

You should avoid the infinite loops and double check if the condition ever becomes False.

Task

Be careful, this loop is infinite. Change the condition so that the loop is finite and list_ contains following values:

1 2 4 8 16 32 64

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Section 2. Chapter 1

Switch to desktop for real-world practiceContinue from where you are using one of the options below