Date

The JavaScript date object can be used to get year, month and day. You can display a timer on the webpage by the help of JavaScript date object.

You can use 4 way to create date object.

1. Date()

2. Date(milliseconds)

3. Date(dateString)

4. Date(year, month, day, hours, minutes, seconds, milliseconds)

   For Example:-

    <script>  
    var date=new Date();  
    var day=date.getDate();  
    var month=date.getMonth()+1;  
    var year=date.getFullYear();  
    document.write("<br>Date is: "+day+"/"+month+"/"+year);  
    </script>
   

   or

    // Date 
    let date =new Date();   // show pre-defined date
    console.log(date);
   
    let date1 = new Date(2000,3,18);  //show giveing date
    console.log(date1);
    console.log(date1.getDate());
    console.log(date1.getDay());
    console.log(date1.getFullYear());
   
    let date2 = new Date();
    console.log(date2.getMinutes());
    console.log(date2.getSeconds());
    console.log(date2.toUTCString());   //universal time
   

   Math

   The JavaScript math object provides several constants and methods to perform mathematical operation.

    // Math
    console.log(Math.round(5.4))     //show nearest value like 5 
    console.log(Math.floor(5.9))    //show smallest value
    console.log(Math.ceil(6.3))     //show bigger value always
    console.log(Math.trunc(4.934))  //remove digit after point 
    console.log(Math.pow(2,2) )       //2 raise to power2- (2*2)
    console.log(Math.sqrt(81))    // square root
    console.log(Math.abs(-23))     // positive number return 
    console.log(Math.random()*10) //return random number