An alphanumeric username consists of a combination of letters (A-Z, a-z) and numbers (0-9). Here are a few examples of alphanumeric usernames:
- johnDoe123
- techGeek789
- sunnyDay456
- codingMaster007
- aliceInWonderland22
- superStar99
- dragonSlayer42
- jazzPiano123
- fitnessGuru555
- skyWalker88