Python program to find sum of n natural numbers; Through this tutorial, i am going to show you how to find the sum of the first n natural number using while loop, for loop, and recursion function.

Formula for Find or Calculate Sum of N Natural Numbers = [n(n+1)]/2 .

## Python Programs to Find/Calculate Sum Of n Natural Numbers

There are three different ways to find sum of n natural numbers in python; as shown below:

- Python Program to Calculate Sum of N Natural Numbers using While Loop
- Python Program to find Sum of N Natural Numbers using For Loop
- Python Program to calculate Sum of N Natural Numbers using Recursion Function

### Python Program to Calculate Sum of N Natural Numbers using While Loop

- Get input number from the user in program
- Iterate while loop and calculate sum of n natural number
- As well as store value in variable
- Print
**sum of n natural number**

# Python Program to find Sum of N Natural Numbers number = int(input("Please Enter any Number: ")) total = 0 value = 1 while (value <= number): total = total + value value = value + 1 print("The Sum of Natural Numbers from 1 to {0} = {1}".format(number, total))

**Output**

Please Enter any Number: 5 The Sum of Natural Numbers from 1 to 5 = 15

### Python Program to find Sum of N Natural Numbers using For Loop

- Get input number from the user in program
- Iterate for loop and calculate sum of n natural number
- As well as store value in variable
- Print
**sum of n natural number**

# Python Program to find Sum of N Natural Numbers number = int(input("Please Enter any Number: ")) total = 0 for value in range(1, number + 1): total = total + value print("The Sum of Natural Numbers from 1 to {0} = {1}".format(number, total))

**Output**

Please Enter any Number: 10 The Sum of Natural Numbers from 1 to 10 = 55

### Python Program to calculate Sum of N Natural Numbers using Recursion Functions

- Get input number from the user in program
- Define a function, which is calcuate sum of n natural number
- As well as store value in variable
- Print
**sum of n natural number**

# Python Program to find Sum of N Natural Numbers def sum_of_n_natural_numbers(num): if(num == 0): return num else: return (num + sum_of_n_natural_numbers(num - 1)) number = int(input("Please Enter any Number: ")) total_value = sum_of_n_natural_numbers(number) print("Sum of Natural Numbers from 1 to {0} = {1}".format(number, total_value))

**Output**

Please Enter any Number: 10 The Sum of Natural Numbers from 1 to 10 = 55

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