Session 4

Author: hamed

Diff for: 04-Variables/01-Declaration/declaration.go

@@ -0,0 +1,63 @@
+// You can edit this code!
+// Click here and start typing.
+package main
+
+func main() {
+	//var varName type = value
+	// 1
+	var number int = 12
+	var firstName string = "Ali"
+
+	println("number: ", number)
+	println("firstName: ", firstName)
+
+	// 2
+	var i2 int
+	var s2 string
+
+	println("i2: ", i2)
+	println("s2: ", s2)
+
+	// 3
+	var i3 = 3
+	var f1 = 3.44
+	var s3 = "Iran"
+
+	println("i3: ", i3)
+	println("f1: ", f1)
+	println("s3: ", s3)
+
+	// 4
+	i4 := 44
+	f2 := 55.2
+	city := "Tehran"
+
+	println("i4: ", i4)
+	println("f2: ", f2)
+	println("city: ", city)
+
+	// 5
+	var i5, f3, s5 = 55, 65.2, "Mazandaran"
+	i6, f4, s6 := 55, 65.2, "Mazandaran"
+
+	println("i5: ", i5)
+	println("f3: ", f3)
+	println("s5: ", s5)
+
+	println("i6: ", i6)
+	println("f4: ", f4)
+	println("s6: ", s6)
+
+	// 6
+
+	var (
+		i7 = 12
+		f5 = 22.5
+		s7 = "Isfahan"
+	)
+
+	println("i7: ", i7)
+	println("f5: ", f5)
+	println("s7: ", s7)
+
+}

Diff for: 04-Variables/02-Constants/consts.go

@@ -0,0 +1,23 @@
+// You can edit this code!
+// Click here and start typing.
+package main
+
+import "fmt"
+
+func main() {
+	const pi float64 = 3.14
+	const (
+		name   = "iran"
+		number = 25
+		city   = "ahwaz"
+	)
+
+	fmt.Printf("%f  \n", pi)
+
+	fmt.Printf("name: %s number: %d city: %s pi: %f \n", name, number, city, pi)
+
+	const googleBaseUrl = "https://www.google.com"
+	const googleMapUrl = "/maps"
+
+	println(googleBaseUrl, googleMapUrl)
+}

Diff for: 04-Variables/03-Scope/scope.go

@@ -0,0 +1,29 @@
+package main
+
+var globalBlock = 125 // globalBlock is a global variable
+
+func main() {
+
+	println(globalBlock)
+	{
+		var localBlock = 124 // localBlock is a local variable
+		println(localBlock)
+
+		{
+			var localBlock = 1250 // this is a local variable
+			localBlock = localBlock * 9
+			println(localBlock)
+		}
+		println(localBlock)
+	}
+	println(globalBlock)
+	//println(localBlock)
+
+	{
+		// var block2 = 123
+	}
+}
+
+func calc() {
+	globalBlock = globalBlock + 10
+}

Diff for: 04-Variables/04-Functions/funcs.go

@@ -0,0 +1,64 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+)
+
+func main() {
+	myString := "this is golang tutorial go go"
+
+	fmt.Println(strings.Contains(myString, "go1"))
+	fmt.Println(strings.ContainsAny(myString, "go1"))
+	fmt.Println(strings.Count(myString, "go"))
+	fmt.Println(strings.Cut(myString, "go1"))
+
+	myStringArray := strings.Split(myString, " ")
+
+	println("Word Count: ", len(myStringArray))
+
+	for _, item := range myStringArray {
+		println(item)
+	}
+
+	myStringArray2 := strings.Join(myStringArray, ",")
+
+	println(myStringArray2)
+
+	println(strings.Repeat("iran ", 10))
+
+	println(strings.Replace(myString, "golang", "go", 3))
+	println(strings.ReplaceAll(myString, "go", "golang"))
+
+	println(strings.Compare("golang", "golang"))
+	println(strings.Compare("Golang", "golang"))
+	println(strings.Compare("Golang", "GOLANG"))
+
+	println(strings.EqualFold("Golang", "GOLANG"))
+	println(strings.EqualFold("Golang", "golang"))
+
+
+	println(strings.HasPrefix("Iran", "Ir"))
+	println(strings.HasPrefix("Iran", "IR"))
+
+	println(strings.HasSuffix("Iran", "an"))
+	println(strings.HasSuffix("Iran", "n"))
+
+	println(strings.Index("Iran", "an"))
+	println(strings.Index("Iran", "r"))
+
+
+	println(strings.ToLower("IrAn"))
+	println(strings.ToUpper("IrAn"))
+	println(strings.Title("Iran is a country"))
+
+	println(strings.Trim("  Iran is a country   ", " "))
+	println(strings.TrimLeft("!!Iran is a country!!", "!"))
+	println(strings.TrimRight("!!Iran is a country!!", "!"))
+	println(strings.Trim("!!Iran is a country!!", "!"))
+
+
+
+
+
+}

Diff for: 04-Variables/04-Functions/print.go

@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	name := "Mahtab"
+	age := 28
+	nationalCode := 4832145478
+	score := 7.5
+	print("My name is ", name, " and my age is ", age, " and my national code is ", nationalCode, " and my score is ", score, "\n")
+	println("My name is", name, "and my age is", age, "and my national code is", nationalCode, "and my score is", score)
+	// println()
+	fmt.Printf("My name is %s and my age is %d and my national code is %d and my score is %f\n", name, age, nationalCode, score)
+
+	fmt.Printf("name: My type is %T\n", name)
+	fmt.Printf("nationalCode binary is %b", nationalCode)
+
+}