Learning GO

For_If_Switch/go.mod

@@ -0,0 +1,3 @@
+module main.go
+
+go 1.23.1

For_If_Switch/main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+	"time"
+)
+
+func condition() {
+	for i := 0; i < 10; i++ {
+		if i%2 == 0 {
+			fmt.Println("this number is even: ", i)
+		}
+	}
+}
+
+func sqrt(x float64) float64 {
+	z := 1.0
+	for i := 0; i < 10; i++ {
+		z -= (z*z - x) / (z * 2)
+		fmt.Println(z)
+	}
+	return z
+}
+
+func main() {
+	defer condition()
+	fmt.Println(sqrt(2))
+
+	fmt.Print("Go runs on ")
+	switch os := runtime.GOOS; os {
+	case "Windows":
+		fmt.Println("MacOs.")
+	case "Linx":
+		fmt.Println("Linux.")
+	default:
+		fmt.Printf("%s.\n", os)
+	}
+
+	fmt.Println("*******************")
+	fmt.Println("When's Saturday?")
+	today := time.Now().Weekday()
+	switch time.Saturday {
+	case today + 0:
+		fmt.Println("Today.")
+	case today + 1:
+		fmt.Println("Tomorrow.")
+	case today + 2:
+		fmt.Println("In two days.")
+	default:
+		fmt.Println("Too far away.")
+	}
+
+}