add 07.2.md, 07.3.md, 07.4.md, 07.5.md

eBook/examples/chapter_7/slices_forrange2.go

@@ -0,0 +1,14 @@
+package main
+import "fmt"
+
+func main() {
+    seasons := []string{"Spring", "Summer", "Autumn", "Winter"}
+    for ix, season := range seasons {
+        fmt.Printf("Season %d is: %s\n", ix, season)
+    }
+
+    var season string
+    for _, season = range seasons {
+        fmt.Printf("%s\n", season)
+    }
+}