text-decoration

The text-decoration CSS property is used to set the text formatting to underline, overline, line-through or blink.
 
Underline and overline decorations are positioned under the text, line-through over it.

Values

Accepts one or more whitespace separated values:

none
Produces no text decoration.
underline
Each line of text is underlined.
overline
Each line of text has a line above it.
line-through
Each line of text has a line through the middle.
blink
Text blinks. Browsers may ignore this value (without making the declaration invalid), as Internet Explorer and Safari does.

<!doctype html>
<html>
    <head>
        <title>CSS Tutorials</title>
        <style type="text/css">
            .p1 {
                text-decoration: line-through;
            } .p2 {
                text-decoration: underline overline;
            }
        </style>
    </head>
    <body>
        <p class="p1">
            The quick brown red fox jumps over the lazy dog
        </p>
        <p class="p2">
            The quick brown red fox jumps over the lazy dog
        </p>
    </body>
</html>