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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

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You are working on a travel application that needs to analyze country names for display purposes. Your task is to find out how many countries in the list have exactly 6 letters in their names. This will allow the app to group and display countries in a visually appealing and organized way.

Set up a variable to keep track of how many countries have exactly 6 letters in their names.
Iterate through the list of countries.
Check the length of each country name by using the len() function.
Update the counter. If a country's name has 6 letters, increment your counter by 1.

Solution

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Section 1. Chapter 3

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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

Set up a variable to keep track of how many countries have exactly 6 letters in their names.
Iterate through the list of countries.
Check the length of each country name by using the len() function.
Update the counter. If a country's name has 6 letters, increment your counter by 1.

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