update book code

eBook/examples/chapter_7/for_arrays.go

@@ -1,14 +1,16 @@
-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])
-    }
-}
+package main
+
+import "fmt"
+
+func main() {
+	var arr1 [5]int
+	// var arr1 = new([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])
+	}
+}