The Else Statement in a for Loop
In Python, the else statement can be used with a for loop. The else block executes when the loop completes all its iterations without being interrupted by a break statement. This feature is particularly useful for confirming that the loop ran to completion.
Let's adapt this concept to the travel_list. We'll print each destination, and when all destinations are processed without interruption, the else block will confirm completion.
1234567travel_list = ['Monako', 'Luxemburg', 'Liverpool', 'Barcelona', 'Munchen'] # Printing all destinations for city in travel_list: print(city) else: print('All destinations have been listed.')
Now, let's add a condition to terminate the loop prematurely using break. If we're looking for a specific city (e.g., 'Barcelona') and find it, the loop stops, and the else block does not execute.
123456789travel_list = ['Monako', 'Luxemburg', 'Liverpool', 'Barcelona', 'Munchen'] # Searching for a specific city for city in travel_list: print(city) if city == 'Barcelona': break else: print('All destinations have been listed.')
In this case, the else block does not execute because the loop was interrupted with break. You can use not in to confirm that a city is absent from the list. If the city is not found in the list, we can execute specific actions.
123456789travel_list = ['Monako', 'Luxemburg', 'Liverpool', 'Barcelona', 'Munchen'] # Checking if a city is NOT in the list search_city = 'Paris' if search_city not in travel_list: print(search_city, 'is not in the travel list.') else: print(search_city, 'is in the travel list.')
The not in operator checks whether an element is not present in a collection (like a list, tuple, or string). Use it to check whether a city is not in the favorite_city list.
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In Python, the else statement can be used with a for loop. The else block executes when the loop completes all its iterations without being interrupted by a break statement. This feature is particularly useful for confirming that the loop ran to completion.
Let's adapt this concept to the travel_list. We'll print each destination, and when all destinations are processed without interruption, the else block will confirm completion.
1234567travel_list = ['Monako', 'Luxemburg', 'Liverpool', 'Barcelona', 'Munchen'] # Printing all destinations for city in travel_list: print(city) else: print('All destinations have been listed.')
Now, let's add a condition to terminate the loop prematurely using break. If we're looking for a specific city (e.g., 'Barcelona') and find it, the loop stops, and the else block does not execute.
123456789travel_list = ['Monako', 'Luxemburg', 'Liverpool', 'Barcelona', 'Munchen'] # Searching for a specific city for city in travel_list: print(city) if city == 'Barcelona': break else: print('All destinations have been listed.')
In this case, the else block does not execute because the loop was interrupted with break. You can use not in to confirm that a city is absent from the list. If the city is not found in the list, we can execute specific actions.
123456789travel_list = ['Monako', 'Luxemburg', 'Liverpool', 'Barcelona', 'Munchen'] # Checking if a city is NOT in the list search_city = 'Paris' if search_city not in travel_list: print(search_city, 'is not in the travel list.') else: print(search_city, 'is in the travel list.')
The not in operator checks whether an element is not present in a collection (like a list, tuple, or string). Use it to check whether a city is not in the favorite_city list.
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