Why my robots.txt not editable?


when i checked my site in yoast seo it is showing non editable robots.txt …why like this ?

how to check whether my site has robots.txt file or not?

in browser when i typed my domain name and robots.txt file it is showing like above pic


To find your robots.txt see below steps


If you can able to access your Root Folder through cPanel (or) any FTP program, you can find your Robots .txt file there.
Download the file and then add, edit, modify (or) delete the content as you wish. Finally upload the new file to become effective.