Question

How to write a recursive function that counts digits of a number in Scala

Answer 1

object CountDigits {
  def countDigits(number: Int): Int = {
    // Base case: If the number is 0, return 0
    if (number == 0) 0
    else 1 + countDigits(number / 10) // Recursive case
  }

  def main(args: Array[String]): Unit = {
    val num = 39071
    
    println(s"Number of digits in $num is: ${countDigits(num)}") 
  }
}

  
     
/*
run:
  
Number of digits in 39071 is: 5

*/

 

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