how to view previous version of a file in Mercurial

Question

I am using mercurial for version control of a few files in a directory. Suppose I have 10 commits (10 changesets or revisions). I want to just view how a particular file, say th

Answer 1

Use the hg cat command with the -r (revision) argument.

hg cat path_to/myfile.cpp -r 46

where 46 is the revision number (use hg log to see revision history)