Python Program to Find the Sum of Natural Numbers

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Python Program to Find the Sum of Natural Numbers

Vinay Khatri
Last updated on August 10, 2022

    Here in this article, we have provided a python program that can find the sum of n natural numbers using Python loop.

    Prerequisite topics to create this Program

    • Python Input, Output
    • Python if…else statement
    • Python Data types
    • Python Operators
    • Python Loop

    Steps

    • First, we ask the user to enter a number n.
    • Using the int() function we will convert the entered string into an integer value.
    • Now using the for loop we will go through the range 1 to the number n+1, add all the numbers and print sum as an output.

    Python Program to Find the Sum of Natural Numbers

    Python Code:

    n = int(input("Enter the number:" ))
    sum=0
    if n > 1:
        for i in range(1,n+1):
            sum+=i
        print("The sum of all natural number upto",n,"is ",sum)
    else:
        print("Please Enter a value greater than 1")

    Output 1:

    Enter the number:2
    The sum of all natural numbers upto 2 is 3

    Output2:

    Enter the number:20
    The sum of all natural numbers upto 20 is 210

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