Question

How to select random two digits from anywhere in a number with Kotlin

Answer 1

import kotlin.random.Random

// Function to select random two distinct digits from a number
fun getRandomTwoDigits(number: Long): String {
    val numStr = number.toString()

    if (numStr.length < 2) {
        return "Error: number must have at least 2 digits"
    }

    val i = Random.nextInt(numStr.length)
    var j: Int
    do {
        j = Random.nextInt(numStr.length)
    } while (j == i)  // ensure different positions

    // Form the two-digit string
    return "${numStr[i]}${numStr[j]}"
}

fun main() {
    val num: Long = 1234567
    val randomTwo = getRandomTwoDigits(num)

    println("Random two digits: $randomTwo")
}



/*
run:

Random two digits: 36

*/

 

70+ SQL courses for beginners and professionals