renamed folder

gobyexample/range.go

@@ -0,0 +1,31 @@
+package main
+
+import "fmt"
+
+func main() {
+	nums := []int{2, 3, 4}
+	sum := 0
+	for _, num := range nums {
+		sum += num
+	}
+	fmt.Println("sum:",sum)
+
+	for i,num := range nums {
+		if num == 3 {
+			fmt.Println("index:",i)
+		}
+	}
+
+	kvs := map[string]string{"a":"apple", "b":"banana"}
+	for k, v := range kvs {
+		fmt.Printf("%s -> %s\n", k, v)
+	}
+	
+	for k := range kvs {
+		fmt.Println("key:", k)
+	}
+
+	for i,c := range "go" {
+		fmt.Println(i,c)
+	}
+}