Course Content

Python Loops Tutorial

Loop Control Statements in a while Loop

The break and continue statements are powerful tools for controlling the flow of a while loop:

break: immediately exits the loop when a specific condition is met;
continue: skips the rest of the current iteration and moves to the next one.

Additionally, the pass statement is used as a placeholder and does nothing when executed, which can be useful for incomplete logic or avoiding errors in empty blocks.

Example: Finding a City and Exiting the Loop

Let's use a while loop to search for a specific city in the travel_list. If the city is found, the loop will terminate using break.


              123456789101112
            
travel_list = ["Monako", "Luxemburg", "Liverpool", "Barcelona", "Munchen"]

# Initialize the index
i = 0

# Search for "Barcelona"
while i < len(travel_list):
    if travel_list[i] == "Barcelona":
        print("Found Barcelona!")
        break
    print(travel_list[i])
    i += 1

Explanation:

The index i starts at 0, pointing to the first city in the list;
The while loop continues as long as i is less than the length of travel_list;
If the current city is "Barcelona", the message is printed, and the loop exits using break and "Munchen" is never reached by the loop;
If "Barcelona" is not found, the current city is printed, and i is incremented to move to the next city.

Example: Counting a Specific City Using continue

Now, let's count how many times "Barcelona" appears in the travel_list, skipping cities that don't match using continue.


              12345678910111213141516
            
travel_list = ["Monako", "Barcelona", "Liverpool", "Barcelona", "Munchen", "Barcelona"]

# Initialize variables
i = 0
counter = 0

# Count occurrences of "Barcelona"
while i < len(travel_list):
    if travel_list[i] != "Barcelona":
        i += 1
        continue
    else:
        counter += 1
    i += 1

print("Total occurrences of 'Barcelona':", counter)

Explanation:

The index i starts at 0, and counter is set to 0 to track occurrences of "Barcelona";
The while loop runs as long as i is less than the length of travel_list;
If the current city is not "Barcelona", the loop skips the remaining code for that iteration using continue and increments i;
For each occurrence of "Barcelona", counter is incremented, and the loop continues until all cities are checked.

Task

Swipe to show code editor

Write a program using a while loop and the continue keyword to:

Skip cities with names longer than 7 characters.
Print only the names of cities with short names (less than or equal to 7 characters).

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 4

Loop Control Statements in a while Loop

The break and continue statements are powerful tools for controlling the flow of a while loop:

break: immediately exits the loop when a specific condition is met;
continue: skips the rest of the current iteration and moves to the next one.

Additionally, the pass statement is used as a placeholder and does nothing when executed, which can be useful for incomplete logic or avoiding errors in empty blocks.

Example: Finding a City and Exiting the Loop

Let's use a while loop to search for a specific city in the travel_list. If the city is found, the loop will terminate using break.


              123456789101112
            
travel_list = ["Monako", "Luxemburg", "Liverpool", "Barcelona", "Munchen"]

# Initialize the index
i = 0

# Search for "Barcelona"
while i < len(travel_list):
    if travel_list[i] == "Barcelona":
        print("Found Barcelona!")
        break
    print(travel_list[i])
    i += 1

Explanation:

The index i starts at 0, pointing to the first city in the list;
The while loop continues as long as i is less than the length of travel_list;
If the current city is "Barcelona", the message is printed, and the loop exits using break and "Munchen" is never reached by the loop;
If "Barcelona" is not found, the current city is printed, and i is incremented to move to the next city.

Example: Counting a Specific City Using continue

Now, let's count how many times "Barcelona" appears in the travel_list, skipping cities that don't match using continue.


              12345678910111213141516
            
travel_list = ["Monako", "Barcelona", "Liverpool", "Barcelona", "Munchen", "Barcelona"]

# Initialize variables
i = 0
counter = 0

# Count occurrences of "Barcelona"
while i < len(travel_list):
    if travel_list[i] != "Barcelona":
        i += 1
        continue
    else:
        counter += 1
    i += 1

print("Total occurrences of 'Barcelona':", counter)

Explanation:

The index i starts at 0, and counter is set to 0 to track occurrences of "Barcelona";
The while loop runs as long as i is less than the length of travel_list;
If the current city is not "Barcelona", the loop skips the remaining code for that iteration using continue and increments i;
For each occurrence of "Barcelona", counter is incremented, and the loop continues until all cities are checked.

Task

Swipe to show code editor

Write a program using a while loop and the continue keyword to:

Skip cities with names longer than 7 characters.
Print only the names of cities with short names (less than or equal to 7 characters).

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 4

Loop Control Statements in a while Loop

The break and continue statements are powerful tools for controlling the flow of a while loop:

break: immediately exits the loop when a specific condition is met;
continue: skips the rest of the current iteration and moves to the next one.

Additionally, the pass statement is used as a placeholder and does nothing when executed, which can be useful for incomplete logic or avoiding errors in empty blocks.

Example: Finding a City and Exiting the Loop

Let's use a while loop to search for a specific city in the travel_list. If the city is found, the loop will terminate using break.


              123456789101112
            
travel_list = ["Monako", "Luxemburg", "Liverpool", "Barcelona", "Munchen"]

# Initialize the index
i = 0

# Search for "Barcelona"
while i < len(travel_list):
    if travel_list[i] == "Barcelona":
        print("Found Barcelona!")
        break
    print(travel_list[i])
    i += 1

Explanation:

The index i starts at 0, pointing to the first city in the list;
The while loop continues as long as i is less than the length of travel_list;
If the current city is "Barcelona", the message is printed, and the loop exits using break and "Munchen" is never reached by the loop;
If "Barcelona" is not found, the current city is printed, and i is incremented to move to the next city.

Example: Counting a Specific City Using continue

Now, let's count how many times "Barcelona" appears in the travel_list, skipping cities that don't match using continue.


              12345678910111213141516
            
travel_list = ["Monako", "Barcelona", "Liverpool", "Barcelona", "Munchen", "Barcelona"]

# Initialize variables
i = 0
counter = 0

# Count occurrences of "Barcelona"
while i < len(travel_list):
    if travel_list[i] != "Barcelona":
        i += 1
        continue
    else:
        counter += 1
    i += 1

print("Total occurrences of 'Barcelona':", counter)

Explanation:

The index i starts at 0, and counter is set to 0 to track occurrences of "Barcelona";
The while loop runs as long as i is less than the length of travel_list;
If the current city is not "Barcelona", the loop skips the remaining code for that iteration using continue and increments i;
For each occurrence of "Barcelona", counter is incremented, and the loop continues until all cities are checked.

Task

Swipe to show code editor

Write a program using a while loop and the continue keyword to:

Skip cities with names longer than 7 characters.
Print only the names of cities with short names (less than or equal to 7 characters).

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

Everything was clear?

Thanks for your feedback!

The break and continue statements are powerful tools for controlling the flow of a while loop:

break: immediately exits the loop when a specific condition is met;
continue: skips the rest of the current iteration and moves to the next one.

Additionally, the pass statement is used as a placeholder and does nothing when executed, which can be useful for incomplete logic or avoiding errors in empty blocks.

Example: Finding a City and Exiting the Loop

Let's use a while loop to search for a specific city in the travel_list. If the city is found, the loop will terminate using break.


              123456789101112
            
travel_list = ["Monako", "Luxemburg", "Liverpool", "Barcelona", "Munchen"]

# Initialize the index
i = 0

# Search for "Barcelona"
while i < len(travel_list):
    if travel_list[i] == "Barcelona":
        print("Found Barcelona!")
        break
    print(travel_list[i])
    i += 1

Explanation:

The index i starts at 0, pointing to the first city in the list;
The while loop continues as long as i is less than the length of travel_list;
If the current city is "Barcelona", the message is printed, and the loop exits using break and "Munchen" is never reached by the loop;
If "Barcelona" is not found, the current city is printed, and i is incremented to move to the next city.

Example: Counting a Specific City Using continue

Now, let's count how many times "Barcelona" appears in the travel_list, skipping cities that don't match using continue.


              12345678910111213141516
            
travel_list = ["Monako", "Barcelona", "Liverpool", "Barcelona", "Munchen", "Barcelona"]

# Initialize variables
i = 0
counter = 0

# Count occurrences of "Barcelona"
while i < len(travel_list):
    if travel_list[i] != "Barcelona":
        i += 1
        continue
    else:
        counter += 1
    i += 1

print("Total occurrences of 'Barcelona':", counter)

Explanation:

The index i starts at 0, and counter is set to 0 to track occurrences of "Barcelona";
The while loop runs as long as i is less than the length of travel_list;
If the current city is not "Barcelona", the loop skips the remaining code for that iteration using continue and increments i;
For each occurrence of "Barcelona", counter is incremented, and the loop continues until all cities are checked.

Task

Swipe to show code editor

Write a program using a while loop and the continue keyword to:

Skip cities with names longer than 7 characters.
Print only the names of cities with short names (less than or equal to 7 characters).

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

Section 2. Chapter 4

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