Iteration with the while Loop
Learn how to iterate variables using the while loop.
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The while loop
Sometimes, we don’t know how many times we want to repeat something. We can use the while loop.
Let’s assume that we want to write a small die guessing game. The user will need to enter a guess between 1 and 6. The computer will then roll a die and let the user know if their guess was correct or not. The program will then allow the user to guess again, and again, and again. However, if the user enters a value of 0 as their guess, we’ll exit them from the game.
We have no way of knowing how many times the user wants to play this game. They might give up after the first try or go on for hundreds of attempts.
A for loop would not work that well for us here because we would need to say how many times the user would need to play before we let them out of the loop. Instead, another type of loop that’s perfect for this scenario is the while loop. This loop works on a condition instead of a count. If the condition is true, it ...