Question

111

(Javascript) Take Three Integers From User to Display Sum, Average, Product, Smallest, and Largest Number

rated 0 times [ 116] [ 5] / answers: 1 / hits: 18733 / 9 Years ago, sat, december 19, 2015, 12:00:00

The first issue that I'm having is with displaying the smallest and largest of the three numbers. Two separate alerts are appearing - the first alert says that the second-largest number is the largest (because it hasn't yet taken the third number into consideration), and the second alert correctly states that the largest number of the three is the largest. Not sure why this is happening - I just need one alert.

The second issue that I'm having is with displaying the sum, average, and product. When I try to run this code the page just goes blank - it doesn't work at all. Right now this portion of the code is commented out. Please help if you know what the problem is. I will need all of this information to display in the same alert. Thank you. JSFiddle: https://jsfiddle.net/HappyHands31/xzsf8ca4/8/

<!DOCTYPE html>



<!-- Fig. 6.14: welcome5.html -->

<!-- Using equality and relational operators. -->

<html>

   <head> 

    <meta charset = utf-8>

    <title>Compare Numbers</title>

    <h1 style = text-align:center>Compare the Integers!</h1>

    <script>



     var firstNumber; // first string entered by the user

     var secondNumber; // second string entered by the user

     var thirdNumber; // third string entered by the user

     var sum; // add the integers

     var average; // add the integers, divide by 3

     var product; // multiply the integers



     // enter first number from user as a string

     firstNumber = window.prompt(Enter first integer);



     // enter second number from user as a string

     secondNumber = window.prompt(Enter second integer);



     // enter third number from user as a string

     thirdNumber = window.prompt(Enter third integer);



     // convert numbers from strings to integers

     firstNumber = parseInt(firstNumber);

     secondNumber = parseInt(secondNumber);

     thirdNumber = parseInt(thirdNumber);



     //determine result

     if (firstNumber > secondNumber && thirdNumber)

        window.alert(firstNumber +  is largest);



     if (secondNumber > firstNumber && thirdNumber)

        window.alert(secondNumber +  is largest); 



     if (thirdNumber > firstNumber && secondNumber)

        window.alert(thirdNumber +  is largest);

    //determine sum, average, and product

    /*

     sum (firstNumber + secondNumber + thirdNumber)

        window.alert(the sum is ); 

     average ((firstNumber + secondNumber + thirdNumber) / 3))

        window.alert(the average is );

     product (firstNumber * secondNumber * thirdNumber)

        window.alert(the product is);

    */ 





// end if

</script>

</head>

<body>

</body>

</html>

Answers

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tyemathewj

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3 Years ago

answered 9 Years ago dustin · Accepted Answer

Please throughout this answer. I embed logic to a function and call once all 3 numbers found and logic also change

<!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Strict//EN http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd>

<!-- Fig. 6.14: welcome5.html -->

<!-- Using equality and relational operators. -->

<html>

    <head>

        <title>Compare Numbers</title>

        <script type=text/javascript>

            var firstNumber, // first string entered by the user

                secondNumber, // second string entered by the user

                thirdNumber, // third string entered by the user

                sum, // add the integers

                average, // add the integers, divide by 3

                product; // multiply the integers



            // enter first number from user as a string

            firstNumber = window.prompt(Enter first integer);



            // enter second number from user as a string

            secondNumber = window.prompt(Enter second integer);



            // enter third number from user as a string

            thirdNumber = window.prompt(Enter third integer);



            // convert numbers from strings to integers

            firstNumber = parseInt(firstNumber);

            secondNumber = parseInt(secondNumber);

            thirdNumber = parseInt(thirdNumber);

            findLargNum(firstNumber,secondNumber,thirdNumber);



            function findLargNum(firstNumber,secondNumber,thirdNumber){

                //determine result

                if (firstNumber > secondNumber) {

                    if(firstNumber > thirdNumber) window.alert(firstNumber +  is largest);

                }

                else if(secondNumber > thirdNumber) window.alert(secondNumber +  is largest);

                else window.alert(thirdNumber +  is largest);



                var sum =  firstNumber + secondNumber + thirdNumber;

                window.alert(the sum is  + sum); 

                var average = (firstNumber + secondNumber + thirdNumber) / 3;

                window.alert(the average is  + average);var product = firstNumber * secondNumber * thirdNumber;window.alert(the product is + product);

            }

        </script>

    </head>

    <body>

        <h1 style = text-align:center>Compare the Integers!</h1>

    </body>

</html>

var firstNumber, // first string entered by the user

	secondNumber, // second string entered by the user

	thirdNumber, // third string entered by the user

	sum, // add the integers

	average, // add the integers, divide by 3

	product; // multiply the integers



// enter first number from user as a string

firstNumber = window.prompt(Enter first integer);



// enter second number from user as a string

secondNumber = window.prompt(Enter second integer);



// enter third number from user as a string

thirdNumber = window.prompt(Enter third integer);



// convert numbers from strings to integers

firstNumber = parseInt(firstNumber);

secondNumber = parseInt(secondNumber);

thirdNumber = parseInt(thirdNumber);

findLargNum(firstNumber,secondNumber,thirdNumber);



function findLargNum(firstNumber,secondNumber,thirdNumber){

	//determine result

	if (firstNumber > secondNumber) {

		if(firstNumber > thirdNumber) window.alert(firstNumber +  is largest);

	}

	else if(secondNumber > thirdNumber) window.alert(secondNumber +  is largest);

	else window.alert(thirdNumber +  is largest);

	

	var sum =  firstNumber + secondNumber + thirdNumber;

	window.alert(the sum is  + sum); 

	var average = (firstNumber + secondNumber + thirdNumber) / 3;

	window.alert(the average is  + average);var product = firstNumber * secondNumber * thirdNumber;window.alert(the product is + product);

}

<h1 style = text-align:center>Compare the Integers!</h1>