Use tokei
tokei is a blazing fast source code line counter. It supports a lot of different languages.
If I did a count in my TIL repository it would output the following:
$ tokei
-------------------------------------------------------------------------------
Language Files Lines Code Comments Blanks
-------------------------------------------------------------------------------
C 4 142 109 1 32
Dockerfile 1 16 8 4 4
Go 1 22 17 1 4
JavaScript 1 40 31 0 9
Markdown 303 7783 7783 0 0
Plain Text 2 316 316 0 0
YAML 1 1 1 0 0
-------------------------------------------------------------------------------
Total 313 8320 8265 6 49
-------------------------------------------------------------------------------
And to underline the blazing fast part:
$ time tokei
-------------------------------------------------------------------------------
Language Files Lines Code Comments Blanks
-------------------------------------------------------------------------------
C 4 142 109 1 32
Dockerfile 1 16 8 4 4
Go 1 22 17 1 4
JavaScript 1 40 31 0 9
Markdown 303 7802 7802 0 0
Plain Text 2 316 316 0 0
YAML 1 1 1 0 0
-------------------------------------------------------------------------------
Total 313 8339 8284 6 49
-------------------------------------------------------------------------------
real 0m0.014s
user 0m0.011s
sys 0m0.021s