Python Program to Calculate Sum and Average of n numbers

Python Program to Calculate Sum and Average of n numbers

Sum and average of n natural numbers in python; Through this tutorial, you will learn how to how to find sum and average of n numbers in python program using for loop, while loop, function.

Python Program to Find or Calculate Sum and Average of n numbers

  • Python Calculate/Find the Sum and Average of n natural numbers using loop and range function.
  • Find/Calculate Sum and Average of n natural numbers in python using while loop
  • Python program to find/calculate the Sum and Average of numbers in a given list
  • The mathematical formula to find/calculate the Sum and Average of n numbers with python program
  • Python Program to Find/Calculate average and sum of n odd natural numbers
  • Python Program to Find/Calculate average and sum of n even natural numbers

1: Python Find/Calculate the Sum and Average of n natural numbers using loop and range function

  • Use a python input() function in your python program that takes an input from the user to enter the number (n) to calculate the sum.
  • Next, declare variables that name sum, avg. avg will contain an average of n natural numbers average.
  • Next, run loop till the entered number using the for loop and range() function.
  • Inside a loop, calculate the sum of n numbers using a sum = sum+num formula.
  • Next, calculate the average of n numbers using a average = sum / n formula.
  • After the loop ends, print the sum, avg variable that contains the sum , average of n numbers
n = input("Enter Number to calculate sum & average")

n = int (n)

sum = 0

for num in range(0, n+1, 1):
    sum = sum+num
    
average = sum / n

print("SUM of", n, "numbers is: ", sum )
print("Average of", n, "natural number is: ", average)

Output:

Enter Number to calculate sum & average 5 
SUM of 5 numbers is:  
15 Average of 5 natural number is:  3.0 

2: Find/Calculate Sum and Average of n natural numbers in python using while loop

Also, use the while loop in python to calculate the sum of n numbers.

  • First of all, you can use a python input() function in your python program that takes input from a user to enter the number (n) to calculate the sum and average.
  • Next, declare variables that name sum and avg. avg will contain the avg of n natural numbers sum.
  • Run while loop until n is greater than zero
  • Add the current value of n to sum variable. And, decrement n number by 1 in while loop body.
  • Next, calculate the average of n numbers using a average = sum / n formula.
  • After the loop finishes, the print sum and avg name variable.

Python program to find the sum and average of n numbers using While loop:

n = input("Enter Number to calculate sum and average")

n = int (n)

totalNo = n

sum=0

while (n >= 0):
    sum += n
    n-=1
    
average  = sum / totalNo

print ("sum of ", totalNo ,"using while loop ", sum)

print ("average of", totalNo ,"using while loop ", average)

Output:

Enter Number to calculate sum and average 5 
sum of  5 using while loop  15 
average of 5 using while loop  3.0 

3: Python program to Find/Calculate the sum and average of numbers in a given list

  • Declare a variable that name avg and sum. Avg will contain the average of n natural numbers.
  • Next, define list and assign a value to a python list.
  • Run for a loop and Add the current value of n to sum variable.
  • Next, calculate the average of n numbers.
  • After the loop finishes, the print sum name variable.
sum = 0

list = [11,4,5,7,99,10,12]

for num in list:
    sum = sum +num
    
average  = sum / len(list)

print ("sum of list element is : ", sum)

print ("Average of list element is ", average )

Output:

sum of list element is :  148 
Average of list element is  21.142857142857142 

4: The mathematical formula to Find/Calculate the sum and Average of n numbers with python program

In the above programs, you have learned how to calculate the sum of n numbers using for loop, while loop and range function.

Now, you will learn how to calculate/find sum of n numbers in python without for loop, while loop in python. Calculate the sum directly using a mathematical formula in python program.

The sum of the n natural number mathematical formula is = n * (n+1) / 2.

In the below python program, you will learn how to use this mathematical formula is = n * (n+1) / 2 to find/calculate sum of n numbers in python programs.

Follow the steps:

  • Take input from user in your python program using input() function.
  • Convert a user inputted number to an integer using int() function.
  • Calculates sum of number by using this formula n * (n+1) / 2 in your python program.
  • Next, Calcuate average of numbers by using this formula average = ( n * (n+1) / 2) / n in your python program.
  • After that, the print name sum variable.
n = input("Enter a number to calculate average and sum")

n = int (n)

sum = n * (n+1) / 2

average  = ( n * (n+1) / 2) / n

print("Sum of fthe irst ", n, "natural numbers using formula is: ", sum )
print("Average of the first ", n, "natural numbers using formula is: ", average )

Output:

Enter a number to calculate average and sum 5 
Sum of fthe irst  5 natural numbers using formula is:  15.0 
Average of the first  5 natural numbers using formula is:  3.0   

5: Python Program to Find/Calculate average and sum of n odd natural numbers

  • Take input from user using python input() function in your python program.
  • Next, declare a variable that name sum, it will contain the sum of n odd numbers.
  • Next, run loop till the entered number using the for loop and range() function.
  • Inside a loop, calculate the sum of n odd numbers using a sum = sum + current number formula with (not (num % 2) == 0).
  • Next, calculate the average of n odd numbers.
  • After the loop ends, print the sum variable that contains the sum of n odd numbers.

Python program to find average and sum of n odd numbers:

n = input("Enter Number to calculate average and sum")

n = int (n)

sum = 0

for num in range(0, n+1, 1):
    
    if(not (num % 2) == 0):
      sum += num;

average  = sum / n

print("SUM of odd numbers is: ", sum )
print("Average of odd numbers is: ", average )

Output:

Enter Number to calculate sum 5 
SUM of odd numbers is:  9 

6: Python Program to Find/Calculate average and sum of n even natural numbers

  • Take input from the user using python input() function in your python program.
  • Next, declare a variable that name sum, it will contain the sum of n even numbers.
  • Next, run loop till the entered number using the for loop and range() function.
  • Inside a loop, calculate the sum of n even numbers using a sum = sum + current number formula with if test condition ((num % 2) == 0).
  • Next, calculate the average of n even numbers.
  • After the loop ends, print the sum variable that contains the sum of n even numbers.

Python program to find average and sum of n even numbers:

n = input("Enter Number to calculate average and sum")

n = int (n)

sum = 0

for num in range(0, n+1, 1):
    
    if((num % 2) == 0):
      sum += num;
      

average  = sum / n

print("SUM of even numbers is: ", sum )
print("Average of even numbers is: ", average )

Output:

Enter Number to calculate average and sum 5 
SUM of even numbers is:  6 
Average of even numbers is:  1.2 

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AuthorAdmin

My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of Tutsmake.com. I like writing tutorials and tips that can help other developers. I share tutorials of PHP, Python, Javascript, JQuery, Laravel, Livewire, Codeigniter, Node JS, Express JS, Vue JS, Angular JS, React Js, MySQL, MongoDB, REST APIs, Windows, Xampp, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL and Bootstrap from a starting stage. As well as demo example.

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