Adds create a map eg

Author: hegdeashwin

codes/ch5_maps/create-a-map.go

@@ -0,0 +1,21 @@
+package main
+
+/**
+ * Note: The code will not run and throw an error: prefixMap declared and not used
+ * As we have declare map and not used in and this is error in go-lang
+ */
+func main() {
+
+	/**
+	 * Declare a map of map type with string.
+	 * var <variable-name> map[<key-type>] <value-type>
+	 */
+	var prefixMap map[string] string
+
+	/**
+	 * make will initialize the map; if we don't use make 
+	 * declaration will set to null;
+	 */
+	prefixMap = make(map[string] string)
+
+}