[Tex/LaTex] What’s the difference between align and align*


After some brief searching I can't find the difference between align and align*. Google summarily ignoring the * is making it harder I think.

Can you tell me the difference between these two?

Moreover, can you tell me where you generally go for this type of information? As a relatively new user I'm still building up my resources.

Best Answer

The star at the end of the name of a displayed math environment causes that the formula lines won't be numbered. Otherwise they would automatically get a number.

You can read about that in the amsmath user's guide since align belongs to amsmath.

Such information can usually be found in the package documentation. Type texdoc packagename at the command prompt or visit http://ctan.org/pkg/packagename. If you use google or another search engine, look for starred and commandname.

Commonly, a star symbol * means a version of a command that behaves differently from the original. That often means suppressing numbering but could also refer to special features. For example, have a look at What's the difference between \newcommand and \newcommand*?