Question

How to check if a number is a perfect square in Scala

Answer 1

// Perfect squares are: 1(1*1), 4(2*2), 9(3*3), 16(4*4), 25(5*5), 36(6*6)...

object PerfectSquares {
  def isPerfectSquare(n: Int): Boolean = {
    val sqr = Math.sqrt(n)

    sqr == Math.floor(sqr)
  }

  def main(args: Array[String]): Unit = {
    if (isPerfectSquare(36)) {
      println("Yes") 
    }
    else {
      println("No")
    }
    
    if (isPerfectSquare(20)) {
      println("Yes") 
    }
    else {
      println("No")
    }
  }
}



/*
run:

Yes
No

*/

 

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