Counting with Loops

In programming, we often 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 we want to calculate the sum of all numbers in a specific range, we 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 we want to calculate the total length of all city names in our list.

Note

An f-string in Python is a concise way to format strings. Prefix the string with f and include expressions or variables in curly braces {}. For example, f"Hello, {name}!" inserts the value of name dynamically.

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(f"Total length of all city names: {total_length}")


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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(f"Total length of all city names: {total_length}")

Task

Swipe to start coding

You are working on a travel application that needs to analyze city names for display purposes. Your task is to calculate the total number of characters across all city names from the provided list.

Iterate through the list of countries.
Calculate the total length of all city names, including spaces and special characters.

Solution

# List of travel destinations

countries = ['Wales', 'Denmark', 'Belgium', 'South Korea', 'Barcelona', 'South Africa', 'Indonesia', 'Singapore', 'Australia', 'India', 'Saudi Arabia', 'Mexico', 'Turkey', 'Greece', 'Netherlands', 'Tokyo', 'Finland', 'Monako', 'United Arab Emirates', 'Egypt', 'Morocco', 'Brazil', 'Argentina', 'Ireland', 'Portugal', 'Chile', 'Paris', 'Spain', 'Czech Republic', 'Sweden', 'Switzerland', 'Liverpool', 'Thailand', 'Luxemburg', 'New Zealand', 'France', 'Italy', 'Germany', 'New York', 'China', 'Munchen', 'Canada', 'Hungary', 'Scotland', 'Norway', 'Austria', 'Ukraine', 'Poland']

# Counter variable

total_length = 0

for country in countries:

total_length += len(country)

# Testing

print("Total length of all country names:", total_length)

Everything was clear?

Thanks for your feedback!

Section 1. Chapter 3

# List of travel destinations

# Counter variable

total_length = 0

# Testing

print("Total length of all country names:", total_length)