WEBVTT

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In this video we will understand while loop.

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Comparison between 4 and while loops.

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Let's have a quick look at the secret number guessing game we previously developed using a 4 loop.

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We used the random module to pick a secret number between 1 and 20.

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The player had 5 attempts to guess it.

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Each guess was checked using if, else if, and else conditional statements.

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If the guess matched the secret number, we printed congratulations.

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You have guessed the secret number.

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Else if the guess was too high, we printed too high.

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Else the guess was too low, we printed too low.

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A 4 loop limited attempts to 5, with a break statement for a correct guess.

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If the player failed, we used an F string to display the correct number.

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Print, F, sorry, the correct number was secret number.

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Now, let's learn how to build the same program using a while loop for repeated attempts.

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First import random, set a random number between 1 and 100.

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Secret number equal to random dot random.

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Open parenthesis, 1 comma 100.

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Close parenthesis.

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Next, we keep track of how many guesses you make using a counter called attempts.

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Set the initial attempt count.

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Attempts equals 0.

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Now write instructions for player.

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Print, welcome to the guessing game.

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Print, I have selected a number between 1 and 100.

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Try to guess it.

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Now, here is the main difference between 4 loop and while loop.

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A 4 loop repeats a set.

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Number of times usually when you know how many times you need to loop.

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But a while loop keeps repeating as long as a condition is true.

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Here, we will see how we can use a while loop to keep the game going until the player guesses the correct number.

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While true.

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To get users guess, write guess equal to int input.

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Enter your guess.

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Attempts plus equals to 1.

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It gives us another chance to try again until you guess the right number.

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Check the player's guess.

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Add conditions to check if the guess is correct, too high or too low.

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We will add an if condition.

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If guess is less than the secret number.

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Print, too low.

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Try again.

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Now add an else if and else conditions.

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LF guess is greater than the secret number.

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Print, too high.

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Try again.

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Else, print, F.

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Congratulations.

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You have guessed the correct number.

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Secret number in attempts.

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Attempts.

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When you guess the right number, the computer congratulates you.

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It even tells you how many attempts it took you.

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Once you guess correctly, the while loop is told to stop by the word break.

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So we add break statement here.

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Save the program with a name like number guessing game.py.

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Click the run button and check how many attempts it takes to find the secret number.

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Look, we guessed the correct number in 9 attempts.

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Now you know how to use a while loop to keep the game running.

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Keep practicing and happy coding.