belajar go h 1

hello_word.go

+package main
+
+import "fmt"
+
+func helloWord() {
+	fmt.Println("HELLO WORD")
+}

main.go

+package main
+
+import "fmt"
+
+const DB_NAME = "IPS"
+
+type VegetablePrice struct {
+	cucumber int
+	chili    int
+}
+
+func main() {
+
+	fmt.Println("======================  1")
+	fmt.Println("new word")
+
+	fmt.Println("======================  2")
+	helloWord()
+
+	fmt.Println("======================  3")
+	price := 1000
+	fmt.Println(price)
+
+	fmt.Println("======================  4")
+	var a, b = 6, "Hello"
+	var c, d = 7, "World!"
+
+	fmt.Println(a, b)
+	fmt.Println(c, d)
+
+	fmt.Println("======================  5")
+	fmt.Println(DB_NAME)
+
+	fmt.Println("======================  6")
+	var e, f = 21, "hello"
+	fmt.Printf("value e : %v and  f : %v\n", e, f)
+
+	fmt.Println("======================  7")
+	g := true
+	h := 3.14
+	fmt.Printf("value bool : %v and value float %v\n", g, h)
+
+	fmt.Println("======================  8")
+	i := [2]string{"new", "word"}
+	j := [3]int{1, 2, 3}
+	k := [...]string{"a", "b", "c"}
+
+	fmt.Printf("value i : %v , value j : %v and value k : %v\n", i, j, k)
+
+	fmt.Println("======================  9")
+	l := [...]int{1, 2, 3, 4}
+	fmt.Printf("length l : %v", len(l))
+
+	fmt.Println("======================  10")
+	m := []int{1, 2, 3, 4, 5, 6}
+
+	fmt.Printf("value %v", m[:len(m)-2])
+
+	fmt.Println("======================  11")
+	n := 5 + 5
+	o := 5 - 3
+	p := 6 % 4
+
+	fmt.Printf("value n : %v , value o : %v and value p : %v\n", n, o, p)
+
+	fmt.Printf("======================  12\n")
+	q := 4
+	r := 2
+
+	if q > r {
+		fmt.Println(q > r)
+	}
+
+	if q < r {
+		fmt.Printf("hasil q < r : %v", q < r)
+	} else if q == r {
+		fmt.Printf("hasil q == r : %v", q == r)
+	} else {
+		fmt.Printf("hasil q > r : %v", q > r)
+	}
+
+	fmt.Printf("======================  13\n")
+	s := 4
+
+	switch s {
+	case 1, 5:
+		fmt.Println("bukan 1 dan 5")
+	case 2:
+		fmt.Println("bukan 2")
+	case 3:
+		fmt.Println("bukan 3")
+	case 4, 6:
+		fmt.Println("nah valuenya 4 or 6")
+	}
+
+	fmt.Printf("======================  14\n")
+	MyNewFunc()
+
+	fmt.Printf("======================  15\n")
+	MyWord("susi belajar go")
+
+	fmt.Printf("======================  16\n")
+	fmt.Println(SumData(5, 3))
+
+	fmt.Printf("======================  17\n")
+	fmt.Println(SumData2(5, 3))
+
+	fmt.Printf("======================  18\n")
+	var market VegetablePrice
+
+	market.chili = 10000
+	market.cucumber = 120000
+
+	fmt.Printf("chili price : %v\n", market.chili)
+	fmt.Printf("chili cucumber : %v\n", market.cucumber)
+
+	fmt.Printf("======================  19\n")
+	Market(market)
+
+	fmt.Printf("======================  20\n")
+	t := map[string]string{"name": "pockcoy", "price": "1000", "qty": "5"}
+	u := map[string]any{"name": "pockcoy", "price": 200, "qty": 400}
+	fmt.Printf("value t : %v\n", t)
+	fmt.Printf("value u : %v\n", u)
+}
+
+func MyNewFunc() {
+	fmt.Printf("new func\n")
+}
+
+func MyWord(name string) {
+	fmt.Printf("value name %v\n", name)
+}
+
+func SumData(x int, y int) int {
+	return x + y
+}
+
+func SumData2(x int, y int) (result int) {
+	result = x - y
+	return result
+}
+
+func Market(vege VegetablePrice) {
+	fmt.Printf("chili price : %v\n", vege.chili)
+}