JavaScript Practice: Five Questions with Solutions || JS Practice

 

      

     Q.1  Write a JavaScript program to display the

      current day and time in the following format.  

      Sample Output : Today is : Tuesday.

      Current time is : 10 PM : 30 : 38

      Solution :-

      let days = ["Sunday","Monday","Tuesday","Wendays",

      "Thursday","Friday","Saturday",]

    let curDate = new Date() ;

    let  day = curDate.getDay();

    document.write("Today is : "+ days[day]) ;

    let H = curDate.getHours();

    let M = curDate.getMinutes();

    let S = curDate.getSeconds();

      document.write(`Current time is : ${H} PM : ${M} : ${S}`) ;

 

      Q.2 Write a JavaScript program to print the current

      window contents.

    <button onclick="window.print()">Click</button>

   Q.3 Write a JavaScript program to get the current date.  

        Expected Output :

        mm-dd-yyyy, mm/dd/yyyy or dd-mm-yyyy, dd/mm/yyyy

     Solution

     let curDate = new Date();

      let mm = curDate.getMonth();

      let dd = curDate.getDay();

      let yyyy = curDate.getFullYear();

      if(dd<10){

        dd = "0"+dd ;

      }

      if(mm<10){

        mm = "0"+mm ;

      }

      document.write(`${mm}-${dd}-${yyyy} <br>`);

      document.write(`${mm}/${dd}/${yyyy} <br>`);

      document.write(`${dd}-${mm}-${yyyy} <br>`);

      document.write(`${dd}/${mm}/${yyyy} <br>`);

     

      Q.4 Write a JavaScript program to find the area of

         a triangle where three sides are 5, 6, 7.  

      Solution

     let a = 5 ;

     let b = 6 ;

     let c = 7 ;

      let s = (a + b + c)/2 ;

      let A = Math.sqrt(s*(s-a)*(s-b)*(s-c)) ;

      document.write(A) ;

       

        Q.5 Write a JavaScript program to determine whether a

           given year is a leap year in the Gregorian calendar.

        Solution

     

       function leapyear(year)

       {

        return (year % 100 === 0) ? (year % 400 === 0) : (year % 4 === 0);

      }

        console.log(leapyear(2016));

        console.log(leapyear(2000));

        console.log(leapyear(1700));

        console.log(leapyear(1800));