Prolog: how to convert string to integer?

Question

So as the title says - how do you convert a string into an integer? the idea is something like this:

convert(String,Integer).

examples:
convert('1',1).
convert('33',33).

I'm using swi prolog

Answer 1

Use atom_number/2. E.g:

  atom_number('123', X).
  X = 123.