##  Class files

This is the 13th video in a series of 21 by Dr Vincent Knight of Cardiff University. There are times when we wish to include text within mathematics, and we must tell LaTeX that we are writing text, otherwise it will assume the word is actually a sequence of symbols. Here we show two approaches to correctly formatting such text, the first using the \mbox command, and the second using the \text command which requires the amsmath package. To try this for yourself, click here to open the 'Text in Mathematics' example.