Capitalize first letter of a filename

Question

I have some files in a folder and would like to uppercase the first letter of all the filenames with a certain extension using a batch script in windows.

example cap only *.m

before:

• foo.m
• bar.m
• picture.jpg

after:

• Foo.m
• Bar.m
• picture.jpg

Answer 1

for %%a in (A B C D E F G H I J K L M N O P Q R S T U V W X Y Z) do (
 ren %%a*.m %%a* >nul 2>&1
)

Check also this -> https://superuser.com/questions/475874/how-does-the-windows-rename-command-interpret-wildcards