Numbers only
Create a regex that matches 12345 and rejects A123 and 12-34.
Use the exercises below as free practice. Try solving them in the playground and then compare with the explanation.
Create a regex that matches 12345 and rejects A123 and 12-34.
Find codes that start with DEV- and end with four digits.
Match only the format DD/MM/AAAA.
Find file names ending in .jpg, .jpeg or .png.
The 20 game levels already include positive and negative cases, score, XP, and progressive hints.
Solve levels