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Write a complete webpage with JavaScript embedded at document level that 1) Read three positive integers from the user using prompt0 function. You may need use parselnt0 or Number) to convert a string to an integer. 2) Calculate the maximum, the minimum, and the average of above four integers and save them into three variables. 3) Use innerHTML, document.write0, window.alert0 to print the maximum, the minimum, and the average e respectively. 1) Each output statement must be used at least once 2) No library function can be used

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Homework Answers

Answer #1

Please find the complete HTML and Java-script code:

Create a HTML page with the following code.

To run the program, open the page in a web browser.
Enter 3 numbers in the the prompts.

HTML & JavaScript code:

   <!DOCTYPE html>
   <html>
   <head>
           <title>Webpage with JavaScript</title>
   </head>
   <body>
   <h3>
   <p id="description"> This page prompts 3 integers. Enter the numbers in the prompts.<br>
   The page will calculate the maximum , minimum and average of the 3 numbers.</p>

   <p id="1"> Maximum number is displayed using window.alert().</p>
   <p id="2"> Minimum number is displayed using document.write().</p>
   <p id="3"> Average is displayed using .innerHTML.</p>
   </h3>

   <h4><p id="avg"></p></h4>
       <script type="text/javascript">

           // variables to hold the numbers
               var firstNumber; // first number to be entered
               var secondNumber; // second number to be entered
               var thirdNumber; // third string to be entered
              
               var maximumNumber;
               var minimumNumber;
              
               // enter first number
               firstNumber = prompt("Enter the number 1");
               // enter second number
               secondNumber = prompt("Enter the number 2");
               // enter third number
               thirdNumber = prompt("Enter the number 3");

               // convert to integers using parseInt
               firstNumber = parseInt(firstNumber);
               secondNumber = parseInt(secondNumber);
               thirdNumber = parseInt(thirdNumber);
          
               //determine maximum,minimum and average
                   if (firstNumber > secondNumber) {
                       if(firstNumber > thirdNumber)
                           maximumNumber = firstNumber ;
                   }
                   else if(secondNumber > thirdNumber)
                       maximumNumber = secondNumber;
                   else maximumNumber = thirdNumber;
                   window.alert(maximumNumber + " is the maximum Number");
                  
                   if (firstNumber < secondNumber) {
                       if(firstNumber < thirdNumber)
                           minimumNumber = firstNumber ;
                   }
                   else if(secondNumber < thirdNumber)
                       minimumNumber = secondNumber;
                   else minimumNumber = thirdNumber;
                  
                   document.write("<h4>" + minimumNumber + " is the minimum Number <br> </h4>");

                   var sum = firstNumber + secondNumber + thirdNumber;
                   var average = sum / 3;
                   document.getElementById("avg").innerHTML = "Average of 3 numbers is : " + average + "<br>";
           </script>
       </body>
   </html>

Output of the Program Screen-shots

This page prompts 3 integers. Enter the numbers in the prompts The page will calculate the maximum, minimum and average of th

This page prompts 3 integers. Enter the numbers in the prompts. The page will calculate the maximum, minimum and average of t

This page prompts 3 integers. Enter the numbers in the prompts. The page will calculate the maximum , minimum and average of

Hope this is helpful. Let me know if you need more information on this.

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