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+```console
+$ 03_02_option --help
+clap [..]
+A simple to use, efficient, and full-featured Command Line Argument Parser
+
+USAGE:
+ 03_02_option[EXE] [OPTIONS]
+
+OPTIONS:
+ -h, --help Print help information
+ -n, --name <NAME>
+ -V, --version Print version information
+
+$ 03_02_option
+name: None
+
+$ 03_02_option --name bob
+name: Some("bob")
+
+$ 03_02_option --name=bob
+name: Some("bob")
+
+$ 03_02_option -n bob
+name: Some("bob")
+
+$ 03_02_option -n=bob
+name: Some("bob")
+
+$ 03_02_option -nbob
+name: Some("bob")
+
+```