Question

How to check if a sequence of numbers is an Arithmetic progression (consecutive differences are the same) in Scala

Answer 1

import scala.util.control.Breaks._
import scala.util.Sorting
 
object SequenceIsArithmeticProgression_Scala {
  def isArithmeticProgression(arr: Array[Int]): Boolean = {
    val size = arr.length
    if (size == 1) {
      return true
    }
 
    Sorting.quickSort(arr)
 
    val difference = arr(1) - arr(0)
    var result: Boolean = true;

    breakable { 
      for (i <- 2 until size) {
        if (arr(i) - arr(i - 1) != difference) {
          result = false
          break
        }
      }
    }
 
    return result
  }
 
  def main(args: Array[String]): Unit = {
    val arr = Array(10, 20, 15, 5, 25, 35, 30)
 
    println(if (isArithmeticProgression(arr)) "Yes" else "No")
  }
}



/*
run:

Yes

*/

 

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