Here is how to find factorial of a number in Kotlin

Below is an example to find the factorial of a number in Kotlin programming language using the do-while loop and using the scanner object to read the user input.

import java.util.*

fun main(args: Array<String>) {
    val reader = Scanner(System.`in`)
    println("Enter a number:")
    var number = reader.nextInt()
    var numberinitial = number
    var factorial = 1
    do {
        factorial *= number
        number--
    } while(number > 0)

    print("The factorial of $numberinitial is $factorial")
}

Run the above Kotlin program to get the following outcome:-

Enter a number:
6
The factorial of 6 is 720

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