How to extract numbers from a string?

Question

I have string contains a path

string=\"toto.titi.12.tata.2.abc.def\"

I want to extract only the numbers from this string.

To extrac

Answer 1

Here is a short one:

string="toto.titi.12.tata.2.abc.def"
id=$(echo "$string" | grep -o -E '[0-9]+')

echo $id // => output: 12 2

with space between the numbers. Hope it helps...