# Coding an Addition Game in Python

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## Introduction: Coding an Addition Game in Python

• This instruction set will teach you step-by-step how to program an addition game that prompts users to answer simple addition problems using random numbers from 0-9 and prints whether they are correct or not!
• Click the image in each step to enlarge it and view the code for that part.

## Step 1: Launch Your Python Coding App.

• This instruction set will be using the IDLE Python program!
• After launching, create a New File in your Python application to start coding.

## Step 2: Import the Random Class.

• We will be using it to generate random numbers!

## Step 3: Define a Python Method With an Input Variable N.

• The input of integer n will determine the number of addition problems the game will print when called!
• This code calls the method "game(n)".

## Step 4: Initialize a Boolean Variable and an Integer Variable.

• Within the game method, initialize a Boolean variable to be used in a ‘while’ loop and an integer to be used as a count variable for correct answers.
• This code calls the Boolean “wrk” and integer “cnt”.
• Remember the importance of indents in Python, as they determine what code is nested where!

## Step 5: Start a ‘for’ Loop for Range N.

• This will loop for the length of the input integer n!

## Step 6: Initialize Two Random Integer Values Between 1 and 10 and Set Boolean Value to True.

• Within this ‘for’ loop, use random.randrange(1,10) to initialize two random integer values between 1 and 9.
• This code calls these “val1” and “val2”.
• Then set the Boolean value to True!

## Step 7: Start a ‘while’ Loop While the Boolean Variable Is True.

• While still within the ‘for’ loop, start a ‘while’ loop while the Boolean variable is True.

## Step 8: Print an Addition Problem With Values 1 and 2 and Take the Answer As Input.

• Next in this ‘while’ loop, we create a try-except statement.
• In your ‘try’ case, print out an addition question using value 1 and value 2 and define an answer variable as the user’s input (this code defines the answer variable as “ans”).

## Step 9: Make an If-else Statement Testing Whether Answer = Value 1 + Value 2.

• Within the ‘try’ case, code an if-else statement testing whether ans = val1 + val2.

## Step 10: If True, Print a Correct Message, Set the Boolean Variable to False, and Increment Count.

• Still within the 'try' statement, if true:
• Print a correct message!
• Set the Boolean variable to False!
• Increment count by 1!

## Step 11: If Not, Print an Incorrect Message and Set the Boolean Value to False.

• In the 'else' statement, print an incorrect message and set the Boolean value to False.

## Step 12: Account for Non-integer Inputs With an Error Message.

• In the ‘except’ case, print an error message to account for non-integer inputs!

## Step 13: At the End of the Program, Print the Count of Problems Out of N That the Player Got Right.

• After all those nested statements, print the count of problems out of n that the player got right!

## Step 14: Look Over Your Code!

• Remember the importance of indentation in Python, as this program utilizes many nested statements.
• Your final program should look like this.

## Step 15: Run This Module and Enjoy Your Math Game!

• After following these steps to code your math program, go ahead and hit Run Module.