Day 10 : Python Program to find sum of first N Natural Numbers

 

n = int(input("Enter a number: "))

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

print(f"The sum of the first {n} natural numbers is: {sum_of_numbers}")

Code Explanation

Input:

n = int(input("Enter a number: "))

input(): Prompts the user to enter a number.

int(): Converts the entered value (a string) into an integer.

𝑛

n represents the count of natural numbers to sum.

Sum Calculation

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

This implements the mathematical formula for the sum of the first 

𝑛 natural numbers

2: Divides the product by 2 using integer division (ensures the result is an integer).

Output

print(f"The sum of the first {n} natural numbers is: {sum_of_numbers}")

f"The sum of the first {n} natural numbers is: {sum_of_numbers}":

Formats the string to display 

𝑛

n and the calculated sum.

#source code --> clcoding.com