Write a Python Program to find Sum of N Natural Numbers using While Loop, For Loop, and Functions with an example.
Python Program to find Sum of N Natural Numbers using For Loop
This Python program allows users to enter any integer value. Next, this program calculates the sum of natural numbers from 1 to user-specified value using For Loop.
# 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))
Python Program to Calculate Sum of N Natural Numbers using While Loop
In this Python sum of natural numbers program, we just replaced the For Loop with While Loop
# 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))
Python Program to calculate Sum of N Natural Numbers using Functions
In this Python program, we created a new function to find the sum of natural numbers. Inside this function, we used If Else statement.
# Python Program to find Sum of N Natural Numbers
def sum_of_n_natural_numbers(num):
if(num == 0):
return num
else:
return (num * (num + 1) / 2)
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))
Python Program to Calculate Sum of N Natural Numbers using Functions
This Python sum of natural numbers program is the same as the above example, but this time we are using Recursion.
# 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))
