CMD For loops
Runs a specified command for each file in a set of files.
FOR %variable IN (set) DO command [command-parameters]
%variable Specifies a replaceable parameter.
(set) Specifies a set of one or more files. Wildcards may be used.
command Specifies the command to carry out for each file.
command-parameters Specifies parameters or switches for the specified command.
To use the FOR command in a batch program, specify %%variable instead of %variable. Variable names are case sensitive, so %i is different
from %I.
If Command Extensions are enabled, the following additional forms of the FOR command are supported:
FOR /D %variable IN (set) DO command [command-parameters]
If set contains wildcards, then specifies to match against directory names instead of file names.
FOR /R