demos/Demo/Day2/6-Util/1.format.js

var util=require("util");

var name="James";
var id=1;
var fav_sub={subject1:"Maths",subject2:"Science"};
var f1=util.format("name is %s",name);
var f2=util.format("id is %d",id);
var f3=util.format("Favourite Subjects are %j",fav_sub);

console.log(f1);
console.log(f2);
console.log(f3);