`<CODE>`

Usage Recommendation
use it

<CODE> indicates text that is the code for a program. <CODE> is rendered in a fixed width font.

this code produces this

This code opens the data file: <P> <CODE> # open the listing file<BR> unless ( open(MYDATA, "data.txt") )<BR> {die "couldn't open data file\n"} </CODE>
This code opens the data file:
# open the listing file unless ( open(MYDATA, "data.txt") ) {die "couldn't open data file\n"}

For lengthy code examples, most authors prefer <PRE ...>, which is much better for showing spacing and indentation.