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+```console
+$ 03_01_flag_count --help
+clap [..]
+A simple to use, efficient, and full-featured Command Line Argument Parser
+
+USAGE:
+ 03_01_flag_count[EXE] [OPTIONS]
+
+OPTIONS:
+ -h, --help Print help information
+ -v, --verbose
+ -V, --version Print version information
+
+$ 03_01_flag_count
+verbose: 0
+
+$ 03_01_flag_count --verbose
+verbose: 1
+
+$ 03_01_flag_count --verbose --verbose
+verbose: 2
+
+```