Script that goes through files in a directory AND subdirectories

Question

I have a simple problem to which I don't find the answer on the net.

Like the title states it, I would like to go trough all the files in a directory AND his sub-directories. I know how to do it with find command but I would like to know how to do it with a simple for loop.

I initially have this line :

for file in $dir/*.png; do

And I'm sure there is a way to have some kind of $dir/*/*.png line that makes it possible with a for loop.

Thanks for your answers.

Answer 1

for file in $(find $dir - type f - name "*.png"); do