I am working on some Bash Scripting, working with matrices and I need help with the following for code. There is a script that will test the code.

Here is the requirements.

matrix dims [MATRIX] Prints error message to stderr, nothing to stdout and return value != 0 if: Argument count is greater than 1 (e.g. `matrix dims m1 m2`). Argument count is 1 but the file named by argument 1 is not readable (e.g. `matrix dims no_such_file`). Otherwise, prints "ROWS COLS" (Space separated!) to stdout, nothing to stderr, and returns 0.