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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

bookRange() in a for Loop 2/2

Note

In many of our tasks, we'll frequently employ a counter variable to facilitate basic arithmetic operations.

For instance, if we wish to sum 2 and 3, we'll initialize the counter with counter = 0 and then add 2 and 3 to it: counter = 0 + 2 + 3 = 5 => counter = 5.

The utilization of such variables is essential for managing straightforward mathematical operations effectively.

Take a look at the following code:


              
12345678

            
counter = 0

# Summing all numbers from 50 to 100 (included)
for i in range(50, 101):
  counter += i

# Printing the counter
print(counter)
copy

How does the code work?

Task

We've previously seen an example of summing elements from 50 to 100 using an increasing list. Now, let's tackle this task with a decreasing list:

  1. Establish a for loop, utilizing i as an element of the range and setting step = -1.
  2. Execute the summation by adding the elements within the range.
  3. Print the value of the counter.

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Section 1. Chapter 3
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bookRange() in a for Loop 2/2

Note

In many of our tasks, we'll frequently employ a counter variable to facilitate basic arithmetic operations.

For instance, if we wish to sum 2 and 3, we'll initialize the counter with counter = 0 and then add 2 and 3 to it: counter = 0 + 2 + 3 = 5 => counter = 5.

The utilization of such variables is essential for managing straightforward mathematical operations effectively.

Take a look at the following code:


              
12345678

            
counter = 0

# Summing all numbers from 50 to 100 (included)
for i in range(50, 101):
  counter += i

# Printing the counter
print(counter)
copy

How does the code work?

Task

We've previously seen an example of summing elements from 50 to 100 using an increasing list. Now, let's tackle this task with a decreasing list:

  1. Establish a for loop, utilizing i as an element of the range and setting step = -1.
  2. Execute the summation by adding the elements within the range.
  3. Print the value of the counter.

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 3
toggle bottom row

bookRange() in a for Loop 2/2

Note

In many of our tasks, we'll frequently employ a counter variable to facilitate basic arithmetic operations.

For instance, if we wish to sum 2 and 3, we'll initialize the counter with counter = 0 and then add 2 and 3 to it: counter = 0 + 2 + 3 = 5 => counter = 5.

The utilization of such variables is essential for managing straightforward mathematical operations effectively.

Take a look at the following code:


              
12345678

            
counter = 0

# Summing all numbers from 50 to 100 (included)
for i in range(50, 101):
  counter += i

# Printing the counter
print(counter)
copy

How does the code work?

Task

We've previously seen an example of summing elements from 50 to 100 using an increasing list. Now, let's tackle this task with a decreasing list:

  1. Establish a for loop, utilizing i as an element of the range and setting step = -1.
  2. Execute the summation by adding the elements within the range.
  3. Print the value of the counter.

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!

Note

In many of our tasks, we'll frequently employ a counter variable to facilitate basic arithmetic operations.

For instance, if we wish to sum 2 and 3, we'll initialize the counter with counter = 0 and then add 2 and 3 to it: counter = 0 + 2 + 3 = 5 => counter = 5.

The utilization of such variables is essential for managing straightforward mathematical operations effectively.

Take a look at the following code:


              
12345678

            
counter = 0

# Summing all numbers from 50 to 100 (included)
for i in range(50, 101):
  counter += i

# Printing the counter
print(counter)
copy

How does the code work?

Task

We've previously seen an example of summing elements from 50 to 100 using an increasing list. Now, let's tackle this task with a decreasing list:

  1. Establish a for loop, utilizing i as an element of the range and setting step = -1.
  2. Execute the summation by adding the elements within the range.
  3. Print the value of the counter.

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