You can check this file on your blog by adding /robots.txt at last to your blog URL in the browser. Take a look at the below example for the demo.
Once you visit the robots.txt file URL you will see the entire code which you are using in your custom robots.txt file. See below image.
This was the today’s complete tutorial on how to add custom robots.txt file in blogger. I really try with my heart to make this tutorial as simple and informative as possible. But still if you have and doubt or query then feel free to ask me. Don’t put any code in your custom robots.txt settings without knowing about it. Simply ask to me to resolve your queries. I’ll tell you everything in detail. Thanks guys to read this tutorial. If you like it then please supports me to spread my words by sharing this post on your social media profiles. Happy Blogging!