Your salary will depend on:
the course you choose (front end, back end, tester)
the company you join (corporation, software house, marketing agency, etc.)
the form of employment you choose (B2B, contract of mandate, contract of specific work)
In general, for example after a programming course at a junior position, you can expect between EUR 23,500 - 48,000 (annual salary). You will earn more after back-end courses as opposed to front-end courses. A higher salary and a more standardized remuneration system will be provided by a large company or corporation, as opposed to a small software house.