Counting with Loops

In programming, you often have to use a counter variable to perform basic arithmetic operations within a loop. This approach allows us to iteratively process data, such as summing values or tracking totals.

For example, if you want to calculate the sum of all numbers in a specific range, you can initialize a counter variable and update it during each iteration.

Let's adapt this concept to our common topic, working with the travel_list. Suppose you want to calculate the total length of all city names in our list.


              1234567891011
            
travel_list = ['Monako', 'Luxemburg', 'Liverpool', 'Barcelona', 'Munchen']

# Initialize counter
total_length = 0

# Iteration through the list
for city in travel_list:
    # Add the length of each city name
    total_length += len(city)

print('Total length of all city names:', total_length)

Task

Swipe to start coding

You are working on a travel application that needs to analyze country names for display purposes. Your task is to count the total number of countries that start with the letter 'S'.

Iterate through the list of countries.
Increment a counter each time you encounter a country that starts with the letter 'S'.

Solution

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 1. Chapter 3

Counting with Loops

For example, if you want to calculate the sum of all numbers in a specific range, you can initialize a counter variable and update it during each iteration.

Let's adapt this concept to our common topic, working with the travel_list. Suppose you want to calculate the total length of all city names in our list.


              1234567891011
            
travel_list = ['Monako', 'Luxemburg', 'Liverpool', 'Barcelona', 'Munchen']

# Initialize counter
total_length = 0

# Iteration through the list
for city in travel_list:
    # Add the length of each city name
    total_length += len(city)

print('Total length of all city names:', total_length)

Task

Swipe to start coding

You are working on a travel application that needs to analyze country names for display purposes. Your task is to count the total number of countries that start with the letter 'S'.

Iterate through the list of countries.
Increment a counter each time you encounter a country that starts with the letter 'S'.

Solution

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 1. Chapter 3

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