2 script.js

//! Numbers::
//! ===>Example:
// var a = 10;
// var b = 5.5;
// console.log(a); //10

// var a = 10;
// var b = 5.5;
// var c = a+b;
// console.log(c); //15.5   

// *************************************************************************************************************************

//! String:
//! ===>Example:

//Method 1:
// var a = "Prabha";
// var b = "ERODE";
// console.log(b); //"ERODE"  

//Method 2:
// var a = "Prabha";
// var b = "ERODE";
// console.log(a+b);//PrabhaERODE 

//Method 3:
// var a = 5.5;
// var b = "Prabha";
// var c = a + b;
// console.log(c);//5.5Prabha

//Method 4:
// var a = "prabha";
// var b = 5.5;
// var c = a+b;
// console.log(c);
// console.log(typeof(c)); //prabha5.5
                          //string      
// var a = 5.5;
// var b = 1991;
// var c = "Prabha";
// console.log(a+b+c);//1996.5Prabha

// var a = "Prabha";
// var b = 1991;
// var c = 5.5;
// console.log(a+b+c);//Prabha19915.5

// var a;
// a = 5.5;
// a = "Prabha";
// console.log(a);//Prabha

// *************************************************************************************************************************

//! Boolean:
//! ===>Example:

// var a = 10;
// var b = 5.5;
// var c = 10;
// console.log(a==b); //false
// console.log(a==c); //true
// console.log(b==c); //false

// *************************************************************************************************************************

//! Array:
//! ===>Example:

// var myfamily = ["amma", "appa", "sister","brother"];
// console.log(myfamily); // [ 'amma', 'appa', 'sister', 'brother' ]
// console.log(myfamily[0]); //amma
// console.log(myfamily[1]); //appa
//console.log(myfamily[2]); //sister
// console.log(myfamily[3]); //brother

// *************************************************************************************************************************

//! Object:
//! ===>Example:

// var a = {myName:"prabhakaran", motherName:"geetha"};
// console.log(a); // { firstName: 'prabhakaran', lastName: 'geetha' }

// var City = {
//     Oldname : "Erodai",
//     Newname  : "Erode",
//     Year     : 1980 ,
//     Favourite : "Turmeric",
//     Leader  : "Periyar"
//   };
//   console.log(City);

//    output:
//    {
//      Oldname: 'Erodai',
//      Newname: 'Erode',
//      Year: 1980,
//      Favourite: 'Turmeric',
//      Leader: 'Periyar' 
//    }
  
// var a = 5.5;
// var b = "Prabha";
// var c = true;
// var d = ["amma", "appa", "sister","brother"];
// var e = {
//     Oldname : "Erodai",
//     Newname  : "Erode",
//     Year     : 1980 ,
//     Favourite : "Turmeric",
//     Leader  : "Periyar"
//   };
//   var f;
//   var g = undefined;
//   var h = "";
// console.log(typeof(a)); //number
// console.log(typeof(b)); //string
// console.log(typeof(c)); //boolean
// console.log(typeof(d)); //object
// console.log(typeof(e)); //object
// console.log(typeof(f)); //undefined ===> A value not declared so it type is undefined.
// console.log(typeof(g)); //undefined ===> Value is undefined, type is undefined.
// console.log(typeof(h)); //string    ===> The value is "", the typeof is "string"

// *************************************************************************************************************************