Learn The First while Loop

The while loop is used to repeat a block of code as long as a specified condition evaluates to True. The condition is checked at the beginning of each iteration, and the loop stops when the condition becomes False.

while condition:
    # Code to execute while the condition is True

condition: a Boolean expression that evaluates to True or False.

We will print all destinations from the travel_list one by one.


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

# Initialize the index
i = 0

# Print each destination using a while loop
while i < len(travel_list):
    print(travel_list[i])
    i += 1

The variable i starts at 0, which represents the first index of the travel_list;
The while loop checks if i is less than the length of the list (len(travel_list)). This ensures the loop doesn't exceed the list bounds;
The loop prints the destination at the current index travel_list[i];
The variable i is incremented by 1 in each iteration using i += 1;
When i becomes equal to the length of the list, the condition evaluates to False, and the loop stops.

Task

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You are a traveler planning your next adventure. To make things manageable, you decide to visit only half of the countries from a given list.

Use a while loop to go through the list, selecting only the first half of the destinations.
Use // for integer division to correctly determine the halfway point of the list for the while loop condition.
Store your chosen countries in the selected list.

Solution

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Section 2. Chapter 1

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while condition:
    # Code to execute while the condition is True