Update and rename Let,const & var to Let,const & var.js

Author: rejwar

Let,const & var

@@ -0,0 +1,15 @@
+let age = 30;
+
+age = 31;
+
+console.log(age);
+
+//const birthYear=1991;
+
+console.log(birthYear);
+
+var job =programmer;
+ 
+
+lastName = "Rifat";
+console.log(lastName);