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Exercise 10

The following code uses the randrange function from Python's random library to obtain and print a random integer within a given range. Using a while loop, it keeps running until it finds a random number that matches the last number in the range. Refactor the code so it doesn't require two different invocations of randrange.

import random

highest = 10
number = random.randrange(highest + 1)
print(number)

while number != highest:
    number = random.randrange(highest + 1)
    print(number)

Solution

import random

highest = 10
while True:
    number = random.randrange(highest + 1)
    print(number)
    if number == highest:
        break

The ideal do/while loop use case occurs when you need to execute some code at least once. We need to do that here. However, Python doesn't have a do/while loop. Instead, we can combine a while True loop with a break statement.

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