Create exercise-loops-and-functions.go

mitDarkMomo · May 28, 2018 · e22c66a · e22c66a
1 parent ff30a1a
commit e22c66a
Showing 1 changed file with 24 additions and 0 deletions.
diff --git a/exercise-loops-and-functions.go b/exercise-loops-and-functions.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"math"
+)
+
+func Sqrt(x float64) float64 {
+	t,z := 0.0, 1.0
+	for {
+		z, t = z - (z*z - x)/(2*z), z
+//		fmt.Printf("z is %v & t is %v. \n", z, t)
+		if math.Abs(z - t) < 1e-8 {
+			break
+		}
+	}
+	return z
+}
+
+func main() {
+	i := 2.
+	fmt.Println(Sqrt(i))
+	fmt.Println(Sqrt(i) == math.Sqrt(i))
+}