// firstName: "Azhar",
// lastName: : "Ali",
// social: {
//             linkedin : "azharali",
//             twitter : "azharali",
//             facebook : "courserawebDev"
//         }



var x;
console.log(x);

if(x == undefined){
    console.log("x is undefined");
}

var x=5;
console.log(x);
if(x == undefined){
    console.log("x is undefined")
}
else{
    console.log("x has been defined")
}