```console $ 03_01_flag_count_derive --help clap [..] A simple to use, efficient, and full-featured Command Line Argument Parser USAGE: 03_01_flag_count_derive[EXE] [OPTIONS] OPTIONS: -v, --verbose... -h, --help Print help information -V, --version Print version information $ 03_01_flag_count_derive verbose: 0 $ 03_01_flag_count_derive --verbose verbose: 1 $ 03_01_flag_count_derive --verbose --verbose verbose: 2 ```