Sum of first 10 natural numbers in python using for loop

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In this post, you will learn a Python program to find the sum of n numbers using a for loop.

In the given example, we have used the for loop to calculate the sum of n numbers. First, we have taken an int data type number input from the user and stored it in a variable num. Initially, the sum is initialised to 0. Then, we used the for loop for iteration in the range from 1 to num + 1 to increase the number up to the given input. In each iteration, we have added the value to the sum and, at last, printed the sum variable.

Algorithm

1. Read the input [num] from the user.
2. Initialize a variable sum with zero.
3. Use a for loop to iterate from 1 to num.
4. Inside the loop, add the num to the sum.
5. At the end, print the value of the sum.

Python Program to find sum of n numbers using for loop

# Sum of natural numbers up to num

num = int[input["Please enter the number: "]]

sum = 0

for value in range[1, num + 1]:
    sum = sum + value
    
print[sum]

Output1:

Please enter the number: 20
210

We can see the sum of the number till 20 is 210 as the output.

Output2:

Please enter the number: 12
78

Output3:

Please enter the number: 23
276

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