IT online Exam

Tuesday 14 March 2023

JavaScript Programs with solutions for HSC online IT Exam March 2023

 

JavaScript Programs


1.Write JavaScript code to print subtraction of 2 numbers.

<html>
<head>
   <title>JS program to subtract two numbers</title>
</head>

<body>
<script>
    var n1, n2, diff;
    n1=parseInt(prompt("Enter first number:"));
    n2=parseInt(prompt("Enter second number:"));
    diff=n2-n1;
    alert("Subtraction - " + diff);
</script>
</body>
</html>


2.Write JavaScript code to print addition of 2 numbers.

<html>
<head>
   <title>JS program to add two numbers</title>
</head>

<body>
<script>
    var n1, n2, sum;
    n1=parseInt(prompt("Enter first number:"));
    n2=parseInt(prompt("Enter second number:"));
    sum=n1+n2;
    alert("Sum- " + sum);
</script>
</body>
</html>


3.Write JavaScript code to print multiplication of 2 numbers.

<html>
<head>
   <title>JS program to multiply two numbers</title>
</head>

<body>
<script>
    var n1, n2, prod;
    n1=parseInt(prompt("Enter first number:"));
    n2=parseInt(prompt("Enter second number:"));
    prod=n1*n2;
    alert("Product - " + prod);
</script>
</body>
</html>


4.Write JavaScript code to print division of 2 numbers.

<html>
<head>
   <title>JS program to divide two numbers</title>
</head>

<body>
<script>
    var n1, n2, q;
    n1=parseInt(prompt("Enter first number:"));
    n2=parseInt(prompt("Enter second number:"));
    q=n1/n2;
    alert("Division - " + q);
</script>
</body>
</html>


5.Write JavaScript code to print addition, subtraction, multiplication & division of 2 numbers.

<html>
<head>
   <title>JS program to add, subtract, multiply, divide two numbers</title>
</head>

<body>
<script>
    var n1, n2, s,d,m,q;
    n1=parseInt(prompt("Enter first number:"));
    n2=parseInt(prompt("Enter second number:"));
    s=n1+n2;
    d=n2-n1;
    m=n1*n2;
    q=n1/n2;
    document.write("<br>Sum - " + s);
    document.write("<br>Difference - " + d);
    document.write("<br>Product - " + m);
    document.write("<br>Division - " + q);
</script>
</body>
</html>


6.Write JavaScript code to display area of circle, accept value from user.
7.Write JavaScript code to print area of triangle.

<html>
<head>
   <title>JS program to calculate area of circle</title>
</head>

<body>
<script>
    var r, area;
    r=parseInt(prompt("Enter radius of the circle:"));
  
    area=3.14*r*r;
    alert("Area - " + area);
</script>
</body>
</html>

8.Write JavaScript code to calculate the average of three numbers.

<html>
<head>
   <title>JS program to calculate average of three numbers</title>
</head>

<body>
<script>
    var n1, n2, n3 avg;
    n1=parseInt(prompt("Enter first number:"));
    n2=parseInt(prompt("Enter second number:"));
    n3=parseInt(prompt("Enter third number:"));
    avg=(n1+n2+n3)/3;
    alert("Average - " + avg);
</script>
</body>
</html>



9.Write JavaScript code to print perimeter of rectangle.

<html>
<head>
   <title>JS program to calculate perimeter of rectangle</title>
</head>

<body>
<script>
    var length, breadth, p;
    length=parseInt(prompt("Enter length of the rectangle:"));
    breadth=parseInt(prompt("Enter breadth of the rectangle:"));
  
    p=2*(length+breadth);
    alert("Perimeter- " + p);
</script>
</body>
</html>


10.Write JavaScript code to print perimeter of trapezium.

<html>
<head>
   <title>JS program to calculate perimeter of trapezium</title>
</head>

<body>
<script>
    var a, b, c, d, p;
    a=parseInt(prompt("Enter length of the first side of trapezium:"));
    b=parseInt(prompt("Enter length of the second side of trapezium:"));
    c=parseInt(prompt("Enter length of the third side of trapezium:"));
    d=parseInt(prompt("Enter length of the fourth side of trapezium:"));
  
    p=a+b+c+d;
    alert("Perimeter - " + p);
</script>
</body>
</html>


11.Write JavaScript code to check whether the number is odd or even.

<html>
<head>
   <title>JS program to check number is odd or even</title>
</head>

<body>
<script>
    var n;
    n=parseInt(prompt("Enter a number:"));
    if(n%2==0)
        alert("Number is even");
    else
        alert("Number is odd");
</script>
</body>
</html>


12. Write JavaScript code to enter two values and display the largest.

<html>
<head>
   <title>JS program to find largest number</title>
</head>

<body>
<script>
    var n1, n2;
    n1=parseInt(prompt("Enter first number:"));
    n2=parseInt(prompt("Enter second number:"));
    if(n1>n2)
       alert("Larger number - " + n1);
    else
        alert("Larger number - " + n2);

</script>
</body>
</html>


13. Write JavaScript code to print multiplication table of 3.

<html>
<head>
   <title>JS program to print multiplication table of 3</title>
</head>

<body>
<script>
    var n=3, i;
    document.write("Multiplication table of 3");
    for(i=1;i<=10;i++)
    {
        document.write("<br>"+n+" * "+i+" = "+n*i);
    }
  
</script>
</body>
</html>


14.Write JavaScript code to print numbers from 1 to 10.

<html>
<head>
   <title>JS program to print numbers from 1 to 10</title>
</head>

<body>
<script>
    var i;
    document.write("Numbers from 1 to 10");
    for(i=1;i<=10;i++)
    {
        document.write("<br>"+i);
    }
  
</script>
</body>
</html>


15.Write JavaScript code to print sum of 50 natural numbers.

<html>
<head>
   <title>JS program to print sum of 50 natural numbers.</title>
</head>

<body>
<script>
    var i, sum=0;
    document.write("Sum of numbers from 1 to 50");
    for(i=1;i<=50;i++)
    {
        document.write("<br>"+i);
        sum=sum+i;
    }
    document.write("<br>Sum - "+sum);
  
</script>
</body>
</html>


16.Write JavaScript code to print all even numbers from 10 to 50.

<html>
<head>
   <title>JS program to print even numbers from 10 to 50</title>
</head>

<body>
<script>
    var i;
    document.write("Even Numbers from 10 to 50");
    for(i=10;i<=50;i++)
    {
       if(i%2==0)
         document.write("<br>"+i);
    }
  
</script>
</body>
</html>


17.Write JavaScript code when user click on button, it will display sum of even numbers from 1 to 10.

<html>
<head>
   <title>JS program to print sum of even numbers.</title>
<script>
function display_sum() {    
    var i, sum=0;
    
    for(i=1;i<=10;i++)
    {
       if(i%2==0) 
          sum=sum+i;
    }
    document.getElementById("disp").innerHTML = "Sum of even numbers from 1to10 - " + sum;
}  
</script>
</head>

<body>

<input type="button"  name="disp_sum" value="Display Sum" onclick="display_sum()">

<br>
<p id="disp">   </p>

</body>
</html>


18.Write JavaScript code to print all odd numbers from 50 to 100.

<html>
<head>
   <title>JS program </title>
</head>

<body>
<h1>JS program to print odd numbers from 50 to 100</h1>
<script>
    var i;
    document.write("Odd Numbers from 50 to 100");
    for(i=50;i<=100;i++)
    {
       if(i%2!=0)
         document.write("<br>"+i);
    }
  
</script>
</body>
</html>



19.Write JavaScript code to print factorial of 7 on button click.

<html>
<head>
   <title>JS program - factorial of number</title>
<script>
function display_factorial(num) {    
      var i, f = 1;
      for (i = num; i >= 1; i--) {
            f=f*i;
      }
    document.getElementById("disp").innerHTML = "Factorial of 7 - " + f;
}  
</script>
</head>

<body>
<h1>JS program to print factorial of number</h1>
<input type="button"  name="disp_fact" value="Display Factorial" onclick="display_factorial(7)">

<br>
<p id="disp">   </p>

</body>
</html>



20.Write JavaScript code to print square of a accepted number.

<html>
<head>
   <title>JS program to display square of a number</title>
</head>

<body>
<script>
    var n, r;
    n=parseInt(prompt("Enter a number:"));
    r=n*n
    alert("Square - " + r);
</script>
</body>
</html>


21.Write JavaScript code to count length of accepted string after click on the button.
<html>
<head>
   <title>JS program</title>
<script>
function display_length() {    
    var str, len;
    str = form1.str_box.value;
    len = str.length;
    document.getElementById("disp").innerHTML = "Length of String  - " + len;
}  
</script>
</head>

<body>
<h1>JS program to print length of string</h1>
<form name="form1">
    <input type="text" name="str_box" size=50> 
    <input type="button"  name="disp_strlen" value="Display Length" onclick="display_length()">
</form>
<br>
<p id="disp">   </p>

</body>
</html>


22.Write JavaScript code to accept two dates and find the difference in those dates.

<html>
<head>
   <title>JS program</title>
<script>
function display_diff() {    
    var d1, d2, diff;
    d1 = new Date(form1.date1.value);
    d2 = new Date(form1.date2.value);
    diff = (d2 - d1) / (1000 * 3600 * 24);
    document.getElementById("disp").innerHTML = "Difference of dates in days  - " + diff;
}  
</script>
</head>

<body>
<h1>JS program to display difference between dates</h1>
<form name="form1">
    <input type="date" name="date1"> 
    <br> <br>
    <input type="date" name="date2"> 
    <br> <br>
    <input type="button"  name="disp_diff" value="Display Difference" onclick="display_diff()">
</form>
<br>
<p id="disp">   </p>

</body>
</html>


23.Write JavaScript code to take a input of string and reverse the string in output.
<html>
<head>
   <title>JS program - revverse of string</title>
<script>
function display_reverse(str) {    
    var newstr;
    newstr = str.split("").reverse().join("")
    document.write("Reverse of String  - " + newstr);
}  
</script>
</head>
<body>
<h1>JS program to reverse a string</h1>
<script>
    var s;
    s = prompt("Input a string");
    display_reverse(s)
</script>
</body>
</html>



24.Write JavaScript code to input 3 digit number and find sum and product of its digit of the number use onblur event for the program.




25.Write JavaScript code to print factorial of accepted number.

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