Python Program to Find the Sum of Natural Numbers

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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