Using CSS in HTML

CSS stands for Cascading Style Sheets and is used to define the look and feel of HTML documents. CSS is a powerful tool for web designers, as it allows them to customize the appearance of their websites without having to write complex HTML code. CSS can be used to change the font size, font family, background color, border styles, and much more. By utilizing CSS, web designers can create beautiful websites that are both functional and aesthetically pleasing.

CSS is easy to learn and use in your HTML documents. The basic syntax of a CSS rule consists of three parts: a selector, a property, and a value. Selectors indicate which elements on the page will be affected by the rule. Properties indicate how those elements should look; they can range from font size to margin widths. Values specify what the property should become; they can be anything from numbers to colors.

For example, if you wanted to set the font size of an H1 element (the heading element) on your page to 18px (pixels), you could write the following code: