How to find out the version of cygwin

Run the command "uname -r" to get the version. For e.g.:
> uname -r
1.7.25(0.270/5/3)

To get complete details, run: "cygcheck --version"
For e.g.:
>cygcheck --version
cygcheck (cygwin) 1.7.25
System Checker for Cygwin
Copyright (C) 1998 - 2013 Red Hat, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

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