Question: Code: !DOCTYPE html> c

The problem was in line 126 where the word usage was not spelt correctly. The correct code is: !DOCTYPE html> c function input() { var usage, category, category_name, rate, total; usage=document.bill.usage.value; var i=0; for(i=0; i

Question: Code: !DOCTYPE html> <html> <head> <title>c</title> </head> <body> <sc

ID: 3548831 • Letter: Q

Question

Question:

Code:

!DOCTYPE html>
<html>

<head>
    <title>c</title>
</head>

<body>

    <script>

        function input()
        {
            var usage, category, category_name, rate, total;

            usage=document.bill.usage.value;

            var i=0;

            for(i=0; i<document.bill.category.length; i++)
            {
                if(document.bill.category[i].selected)
                {
                category=document.bill.category[i].value;
                }

            category_name=get_category_name(category);

            rate=get_rate(category_name,usage);

            total=rate*usage;

            document.write("Total bill : RM"+total);

            }


        }

        function get_category_name(category)
        {

            var category_name;

            if(category=="R")
            {
                category_name="Residential";
            }

            else if(category="I")
            {
                category_name="Industry"
            }

            return category_name;

        }

        function get_rate(category_name,usage)
        {

            var rate;

            switch (category_name)
            {

            case "Residential":

                if(usage<20)
                {

                    rate=0.20;

                }

                else if(usage>20&&usage<35)
                {

                    rate=0.30;

                }

                else if(usage>35)
                {

                    rate=0.45;

                }

            break;

            case "Industry":

                if(usage<20)
                {

                    rate=0.10;

                }

                else if(usage>20&&usage<35)
                {

                    rate=0.20;

                }

                else if(usage>35)
                {

                    rate=0.35;

                }

            break;
            }

            return rate;

        }

    </script>

    <form name="bill">

        <p>Water Usage : <input type="text" name="uasge"/> m<sup>2</sup></p>

        <p>Category:
                <select name="category">
                    <option value="R">Residential</option>
                    <option value="I">Industry</option>
                </select>
        </p>

        <p><input type="submit" name="submitbtn" value="get Bill"/>

    </form>

</body>

</html>

This program will calculate the cost of water usage. When the button is clicked, it will call function input(). function input(): Get the usage and category from the form. Call function get_category_name(...) and pass the category code to get the category name. Call function get_rate(...) and pass usage and category name to get the rate. Calculate the bill and display on the browser as shown below. function get_category_name(...): Based on the category code, identify the category name using an if else statement. If "R", the name is "Residential". If "I", the name is "Industry". function get_rate(...): Based on the category name, identify the rate using switch statement and if else statement.

Explanation / Answer

The problem was in line 126 where the word usage was not spelt correctly.

The correct code is:

!DOCTYPE html>

<html>

<head>

</head>

<body>

function input()

{

var usage, category, category_name, rate, total;

usage=document.bill.usage.value;

var i=0;

for(i=0; i<document.bill.category.length; i++)

{

if(document.bill.category[i].selected)

{

category=document.bill.category[i].value;

}

category_name=get_category_name(category);

rate=get_rate(category_name,usage);

total=rate*usage;

document.write("Total bill : RM"+total);

}

function get_category_name(category)

{

var category_name;

if(category=="R")

{

category_name="Residential";

}

else if(category="I")

{

category_name="Industry"

}

return category_name;

}

function get_rate(category_name,usage)

{

var rate;

switch (category_name)

{

case "Residential":

if(usage<20)

{

rate=0.20;

}

else if(usage>20&&usage<35)

{

rate=0.30;

}

else if(usage>35)

{

rate=0.45;

}

break;

case "Industry":

if(usage<20)

{

rate=0.10;

}

else if(usage>20&&usage<35)

{

rate=0.20;

}

else if(usage>35)

{

rate=0.35;

}

break;

}

return rate;

}

</script>

<p>Water Usage : <input type="text" name="usage"/> m<sup>2</sup></p>

<p>Category:

<option value="R">Residential</option>

<option value="I">Industry</option>

</select>

</p>

</form>

</body>

</html>

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