Scala : improve sqrt using block and scope

1 files changed, 11 insertions, 8 deletions

diff --git a/Scala/sqrt/sqrt.scala b/Scala/sqrt/sqrt.scala
index 0ab9164..b99d61e 100644
--- a/Scala/sqrt/sqrt.scala
+++ b/Scala/sqrt/sqrt.scala
@@ -3,17 +3,20 @@ object Main extends App {
 
   def abs(x:Double) = if (x < 0) -x else x
 
-  def sqrtIter(guess: Double, x: Double): Double =
-    if (isGoodEnough(guess, x)) guess
-    else sqrtIter(improve(guess, x), x)
+  def sqrt(x: Double) = {
 
-  def isGoodEnough(guess: Double, x: Double) =
-    abs(guess * guess - x ) /x < 0.001
+    def sqrtIter(guess: Double): Double =
+      if (isGoodEnough(guess)) guess
+      else sqrtIter(improve(guess))
 
-  def improve(guess: Double, x: Double) =
-    (guess + x / guess) / 2
+    def isGoodEnough(guess: Double) =
+      abs(guess * guess - x ) /x < 0.001
 
-  def sqrt(x: Double) = sqrtIter(1.0, x)
+    def improve(guess: Double) =
+      (guess + x / guess) / 2
+
+    sqrtIter(1.0)
+  }
 
   println(sqrt(2))
   println(sqrt(0.001))