Factorial calculation with Recursion in R

R Programming: Control Structure Exercise-8 with Solution

Write a R program to find the factorial of a given number using recursion.

Sample Solution :

R Programming Code :

# Define a function to calculate the factorial of a given number using recursion
factorial <- function(n) {
    if (n == 0) {  # Base case: Factorial of 0 is 1
        return(1)
    } else {
        # Recursive case: Calculate factorial using recursion
        return(n * factorial(n - 1))
    }
}

# Test the function with an example input
number <- 7  # Example number for which factorial is to be calculated
result <- factorial(number)

# Print the result
cat("The factorial of", number, "is:", result, "\n")

Output:

The factorial of 7 is: 5040               

Explatnaion:

In the exercise above,

• The "factorial()" function takes one parameter 'n', which represents the number whose factorial is to be calculated.
• It starts with a base case: if 'n' is 0, it returns 1 because the factorial of 0 is defined as 1.
• If 'n' is greater than 0, it uses recursion to calculate the factorial by multiplying 'n' with the factorial of (n-1).
• The function is then tested with an example input ('number'), and the result is printed to the console.

R Programming Code Editor:

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