Question

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

Answer 1

import scala.util.Random

object RandomTwoDigitsApp {

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

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

    val rand = new Random()

    val i = rand.nextInt(numStr.length)
    var j = rand.nextInt(numStr.length)
    while (j == i) {
      j = rand.nextInt(numStr.length)
    }

    // Form the two-digit string
    s"${numStr(i)}${numStr(j)}"
  }

  def main(args: Array[String]): Unit = {
    val num: Long = 1234567
    val randomTwo = getRandomTwoDigits(num)

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



/*
run:

Random two digits: 26

*/

 

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