Scala Program: Calculate the factorial with MathUtils Object

Scala OOP Exercise-3 with Solution

Write a Scala program that creates an object MathUtils with a static method factorial that calculates the factorial of a given number.

Sample Solution:

Scala Code:

object MathUtils {
  def factorial(n: Int): BigInt = {
    if (n == 0 || n == 1) {
      1
    } else {
      n * factorial(n - 1)
    }
  }
}

object Main {
  def main(args: Array[String]): Unit = {
    val number1 = 4
    val result1 = MathUtils.factorial(number1)
    println(s"The factorial of $number1 is: $result1")
    val number2 = 10
    val result2 = MathUtils.factorial(number2)
    println(s"The factorial of $number2 is: $result2")
  }
}

Sample Output:

The factorial of 4 is: 24
The factorial of 10 is: 3628800

Explanation:

In the above exercise -

The "MathUtils" object contains the factorial method. This method calculates the factorial of a given number using recursion. If the number is 0 or 1, it returns 1. Otherwise, it recursively calls itself with n - 1 and multiplies the result by n.

The "Main" object contains the main method where you can test the factorial method. In this example, it calculates the factorial of the number 4 and 10 and prints the result.

Scala Code Editor :

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