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Python Loops Tutorial
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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

bookFirst Nested Loop Pattern

A nested loop is a loop located within the body of an outer loop. Either the inner or outer loop can take on various forms, including a while loop or a for loop. For instance, the outer for loop can encompass a while loop, and conversely.

Initially, let's attempt to create a basic image using a nested loop.

Employ end = ' ' within the print function to display elements in a row.

Examine the code below:


              
1234567

            
# Printing a triangle
# Outer for loop
for i in range(1, 5):
  # Inner for loop
  for j in range(1, i + 1):
    print('*', end=' ')
  print('')
copy

How does the code work?

Task

You should reverse the triangle shown in the example.

  1. Configure the range() function for the outer for loop with step = -1.
  2. Configure the range() function for the inner for loop.
  3. Print '*' within the nested loop.

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 3. Chapter 1
toggle bottom row

bookFirst Nested Loop Pattern

A nested loop is a loop located within the body of an outer loop. Either the inner or outer loop can take on various forms, including a while loop or a for loop. For instance, the outer for loop can encompass a while loop, and conversely.

Initially, let's attempt to create a basic image using a nested loop.

Employ end = ' ' within the print function to display elements in a row.

Examine the code below:


              
1234567

            
# Printing a triangle
# Outer for loop
for i in range(1, 5):
  # Inner for loop
  for j in range(1, i + 1):
    print('*', end=' ')
  print('')
copy

How does the code work?

Task

You should reverse the triangle shown in the example.

  1. Configure the range() function for the outer for loop with step = -1.
  2. Configure the range() function for the inner for loop.
  3. Print '*' within the nested loop.

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 3. Chapter 1
toggle bottom row

bookFirst Nested Loop Pattern

A nested loop is a loop located within the body of an outer loop. Either the inner or outer loop can take on various forms, including a while loop or a for loop. For instance, the outer for loop can encompass a while loop, and conversely.

Initially, let's attempt to create a basic image using a nested loop.

Employ end = ' ' within the print function to display elements in a row.

Examine the code below:


              
1234567

            
# Printing a triangle
# Outer for loop
for i in range(1, 5):
  # Inner for loop
  for j in range(1, i + 1):
    print('*', end=' ')
  print('')
copy

How does the code work?

Task

You should reverse the triangle shown in the example.

  1. Configure the range() function for the outer for loop with step = -1.
  2. Configure the range() function for the inner for loop.
  3. Print '*' within the nested loop.

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!

A nested loop is a loop located within the body of an outer loop. Either the inner or outer loop can take on various forms, including a while loop or a for loop. For instance, the outer for loop can encompass a while loop, and conversely.

Initially, let's attempt to create a basic image using a nested loop.

Employ end = ' ' within the print function to display elements in a row.

Examine the code below:


              
1234567

            
# Printing a triangle
# Outer for loop
for i in range(1, 5):
  # Inner for loop
  for j in range(1, i + 1):
    print('*', end=' ')
  print('')
copy

How does the code work?

Task

You should reverse the triangle shown in the example.

  1. Configure the range() function for the outer for loop with step = -1.
  2. Configure the range() function for the inner for loop.
  3. Print '*' within the nested loop.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 3. Chapter 1
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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