A simple program to calculate a Fibonacci number up to fib number 1477

fib.scala

object fibobject {

	def fib(n: Int): Double ={

		@annotation.tailrec
		def fibLocalFunc(n: Int, curr: Double,prev: Double): Double ={

			if(n<=0) curr
			else fibLocalFunc(n-1,curr+prev, curr)

		}

		if(n==1) 0
		else if (n==2) 1
		else fibLocalFunc(n-2,1,0)

	}


	def main (args: Array[String]): Unit = {
		println("Enter a number:")
		val input = scala.io.StdIn.readLine()
		println(fib(input.toInt))
	}

}