Make an html calculator.
Answers
As you might have already guessed, we would need to create “buttons” for inputting values and a screen for displaying these values.
Well, basically, that’s it!
But in fancier terms, these are the components we need:
· A display area for displaying operators, operands and solutions.
· Buttons for inputting values to the display screen
Visually, a calculator is a table enclosed in a container. And as you should already know tables are made of rows and columns with cells to contain table data.
Now you get the concepts, let’s get started!
This is the basic format for HTML documents.
<html>
<head></head>
<body>
<! -- Content -- >
</body>
</html>
If you don’t already understand how to deploy HTML scripts you should take a look at this short tutorial.
The visible part of a webpage goes into the <body> </body> tag.
Before I go any further, it’s essential you understand certain HTML terminologies (fancy words) such as tags, attributes and elements.
Tags: Tags are basic labels that define and separate parts of your markup into elements. They are comprised of a keyword surrounded by angle brackets <>. Content goes between two tags and the closing one is prefixed with a slash (Note: there are some self-closing HTML tags, like image tags).
<!-- This is an opening and closing paragraph tag -->
<p></p>
Attributes: A property of an HTML element used to provide additional instructions to a given HTML tag. The attribute is specified in the opening HTML tag.
<!-- Here, the class is the attribute -->
<p class=""></p>
Elements: An HTML element usually consists of a opening tag and end tag, with the content inserted in between.
<!-- The element spans from the opening tag to the closing tag -->
<p class="paragraph">This is a paragraph.</p>
Okay! Enough with the basics. Let’s dance.
The first thing that goes into our HTML body is the form element <form> </form>. After it has been created, an attribute titled “name”, with the value, calculator, should then be added to the opening form tag.
<html>
<head></head>
<body>
<form name=”calculator”>
</form>
</body>
</html>
The form element is to serve as a wrapper (container) for the table which will contain the main calculator components.
HTML tables allow web designers to arrange data like text, images, links, other tables, etc. into rows and columns of cells. They are created using the <table> tag in which the <tr> tag is used to create table rows and <td> is used to create data cells.
Row is the horizontal and column is the vertical one, by the way.
Enough talk, let’s code now.
Inside the opening and closing <form> tag, we need to create a table element.
<html>
<head></head>
<body>
<form name=”calculator”>
<table>
</table>
</form>
</body>
</html>
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The end !!!!