Question on how to add an area to type in

I saw this on a project by 277970--I was making a similar project where the user has to type in answers--I'm so confused on how to do this (I'm really new to snap) and I was wondering if anyone could help me to be able to figure out how to add something in where the user could type in the answer. I tried looking into their code to find anything specific but couldn't find anything helpful.

You can use the ask [] and wait block to show an input that the user can type in. When the user submits the result (pressing enter), the value they typed in is stored in the (answer) block.

Thank you so much!