Write a Program to calculate sum and average of three numbers

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Write a Program to calculate sum and average of three numbers

Vinay Khatri
Last updated on June 10, 2022

    In this tutorial, we will learn how to write a script in C, C++, and Python to calculate the sum and average of three numbers. The sum of three numbers can be calculated by using the addition operator between the numbers and to find out their average we can divide the sum by 3.

    Example 1

    Input: 4 5 6
    Output sum = 15 , average = 5

    C Program to calculate sum and average of three numbers

    #include <stdio.h>
    
    int main() 
    {
       int num1, num2, num3, sum=0;
       float  average;
       
       //input 3 numbers from user
       printf("Enter 3 Numbers eg(4 5 6): ");
       scanf("%d %d %d", &num1, &num2, &num3);
       
       //sum of three numbers
       sum = num1+num2+num3;
       
       //average of 3 numbers 
       average = sum/3;
       
       printf("Sum of (%d %d %d) = %d \n", num1, num2, num3, sum);
       printf("Average of (%d %d %d) = %.2f", num1, num2, num3, average);
       return 0;
    }

    Output

    Enter 3 Numbers eg(4 5 6): 11 15 16
    Sum of (11 15 16) = 42
    Average of (11 15 16) = 14.00

    C++ Program to calculate sum and average of three numbers

    #include <iostream>
    using namespace std;
     
    int main() 
    {	
       int num1, num2, num3, sum=0;
       float  average;
       
       //input 3 numbers from user
       cout<<"Enter 3 Numbers eg(4 5 6): "; cin>>num1>>num2>>num3;
       
       //sum of three numbers
       sum = num1+num2+num3;
       
       //average of 3 numbers 
       average = sum/3;
       
       cout<<"Sum of ("<<num1 <<" "<<num2<<" "<<num3<<") ="<<sum<<endl;
       cout<<"Average of ("<<num1 <<" "<<num2<<" "<<num3<<") ="<<average<<endl;
       return 0;
    }

    Output

    Enter 3 Numbers eg(4 5 6): 11 34 55
    Sum of (11 34 55) =100
    Average of (11 34 55) =33

    Python Program

    # input 3 numbers from user
    num1, num2, num3 = map(int, input("Enter 3 Numbers eg(4 5 6): ").split())
    
    # sum of three numbers
    sum_ = num1+num2+num3;
    
    # average of 3 numbers
    average = sum_/3;
    
    print(f"Sum of({num1} {num2} {num3}) = {sum_}")
    print(f"Average of({num1} {num2} {num3}) = {average}")

    Output

    Enter 3 Numbers eg(4 5 6): 4 5 6
    Sum of(4 5 6) = 15
    Average of(4 5 6) = 5.0

    Wrapping Up!

    In this programming tutorial, we learned how to calculate the sum and average of three numbers in C, C++, and Python. If we analyze the above programs the time and space complexities both are O(1), which means a constant complexity .

    If you like this article or have any suggestions please let us know by commenting down below.

    Happy Coding!

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