add 7.0.md and 7.1.md

eBook/examples/chapter_7/for_arrays.go

@@ -0,0 +1,14 @@
+package main
+import "fmt"
+
+func main() {
+    var arr1 [5]int
+
+    for i:=0; i < len(arr1); i++ {
+        arr1[i] = i * 2
+    }
+
+    for i:=0; i < len(arr1); i++ {
+        fmt.Printf("Array at index %d is %d\n", i, arr1[i])
+    }
+}