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Python Loops Tutorial
course content

Course Content

Python Loops Tutorial

Python Loops Tutorial

1. The for Loop
The first for LoopRange() in a for Loop 1/2Range() in a for Loop 2/2List & for LoopIf/Else in a for LoopBreak/Continue in a for LoopPass, Else in a for LoopEnumerate() in a for LoopChallenge
2. The while Loop
The First while LoopInfinite LoopList & while LoopIf/Else in a while LoopBreak/Continue in a while LoopPass, Else in a while Loop
3. Nested Loops
First Nested Loop PatternNested for LoopNested while LoopWhile Loop inside a for LoopIf/Else in a Nested LoopBreak/Continue in a Nested LoopChallenge

bookIf/Else in a for Loop

In the future, you'll frequently encounter and use the if/else construct within loops. Here's a quick reminder of how it works:

  • if - In this part, you specify the condition to check;

  • else - The actions to execute if the condition in the if statement evaluates to False.

Look at the code below:


              
12345678

            
numbers = [2, 3, 4, 5, 6, 7, 8, 11]

# Printing special message, if 8 is in the list
for i in numbers:
  if i == 8:
     print('Here is 8!')
  else:
    print('This num is not 8')
copy

How does the code work?

Task
test

Swipe to show code editor

To create a program that determines whether a number in the list is less than 10, follow these steps:

  1. Configure the for loop to operate on the numbers, using i as an element of the list.
  2. Set the condition i < 10 to check if the number is less than 10.
  3. Display the appropriate messages: 'is lower than 10' if an element is lower than 10 (inside the if block), and 'is greater or equal to 10' if an element is greater than or equal to 10 (inside the else block).

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Section 1. Chapter 5
toggle bottom row

bookIf/Else in a for Loop

In the future, you'll frequently encounter and use the if/else construct within loops. Here's a quick reminder of how it works:

  • if - In this part, you specify the condition to check;

  • else - The actions to execute if the condition in the if statement evaluates to False.

Look at the code below:


              
12345678

            
numbers = [2, 3, 4, 5, 6, 7, 8, 11]

# Printing special message, if 8 is in the list
for i in numbers:
  if i == 8:
     print('Here is 8!')
  else:
    print('This num is not 8')
copy

How does the code work?

Task
test

Swipe to show code editor

To create a program that determines whether a number in the list is less than 10, follow these steps:

  1. Configure the for loop to operate on the numbers, using i as an element of the list.
  2. Set the condition i < 10 to check if the number is less than 10.
  3. Display the appropriate messages: 'is lower than 10' if an element is lower than 10 (inside the if block), and 'is greater or equal to 10' if an element is greater than or equal to 10 (inside the else block).

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 5
toggle bottom row

bookIf/Else in a for Loop

In the future, you'll frequently encounter and use the if/else construct within loops. Here's a quick reminder of how it works:

  • if - In this part, you specify the condition to check;

  • else - The actions to execute if the condition in the if statement evaluates to False.

Look at the code below:


              
12345678

            
numbers = [2, 3, 4, 5, 6, 7, 8, 11]

# Printing special message, if 8 is in the list
for i in numbers:
  if i == 8:
     print('Here is 8!')
  else:
    print('This num is not 8')
copy

How does the code work?

Task
test

Swipe to show code editor

To create a program that determines whether a number in the list is less than 10, follow these steps:

  1. Configure the for loop to operate on the numbers, using i as an element of the list.
  2. Set the condition i < 10 to check if the number is less than 10.
  3. Display the appropriate messages: 'is lower than 10' if an element is lower than 10 (inside the if block), and 'is greater or equal to 10' if an element is greater than or equal to 10 (inside the else block).

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

In the future, you'll frequently encounter and use the if/else construct within loops. Here's a quick reminder of how it works:

  • if - In this part, you specify the condition to check;

  • else - The actions to execute if the condition in the if statement evaluates to False.

Look at the code below:


              
12345678

            
numbers = [2, 3, 4, 5, 6, 7, 8, 11]

# Printing special message, if 8 is in the list
for i in numbers:
  if i == 8:
     print('Here is 8!')
  else:
    print('This num is not 8')
copy

How does the code work?

Task
test

Swipe to show code editor

To create a program that determines whether a number in the list is less than 10, follow these steps:

  1. Configure the for loop to operate on the numbers, using i as an element of the list.
  2. Set the condition i < 10 to check if the number is less than 10.
  3. Display the appropriate messages: 'is lower than 10' if an element is lower than 10 (inside the if block), and 'is greater or equal to 10' if an element is greater than or equal to 10 (inside the else block).

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 1. Chapter 5
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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