Update README.md

README.md

@@ -22,12 +22,26 @@ rdeadcode -json deadcode.json
 
 ### Independent features of `rdeadcode`
 
-passed the argument `-file` and `-function` to remove the dead code from the file.
+Pass the argument `-file` and `-function` to remove the dead code from the file.
 
 ```shell
 rdeadcode -file path/to/your/file.go -function deadFunction
 ```
 
+#### -help
+```shell
+$ rdeadcode -help
+Usage of rdeadcode:
+  -json string
+    	JSON file generated by deadcode
+  -file string
+    	File to remove function from
+  -function string
+    	Function to remove
+  -ignore string
+    	Ignore files matching glob pattern
+```
+
 ## Known issues
 
 > [!WARNING]