Sum of Natural Numbers Using Recursion

In this example, you'll learn to find the sum of natural numbers using recursion. To solve this problem, a recursive function calculate_sum() function is created.

Example: Sum of Natural Numbers

# Program to find the sum of
# natural numbers upto n
# using recursive function

calculate_sum() <- function(n) {
    if(n <= 1) {
        return(n)
    } else {
        return(n + calculate_sum(n-1))
    }
}

Output

> calculate_sum(7)
[1] 28

Here, we ask the user for a number and use recursive function calculate_sum() to compute the sum up to that number.