title: How to get file size in byte using wc -c
body: <p>when I use the command to get the file size in bye using <code>wc -c</code> the command return two values, the size in byte and the file name, ex:
  the output for <code>wc -c my_file</code> is <code>322 my_file</code>
  I need to get only the first value to use it <code>if</code> condition, and I need to use this specific command not any other one..
  Any help please, thank you.</p>