CamelCase Regex

Example:

^[a-z]+(?:[A-Z][a-z]*)*$

Matches:
✓ camelCase
✓ myVariableName
✗ PascalCase (starts uppercase)

Match camelCase identifiers: ^[a-z]+(?:[A-Z][a-z]*)*$

Try Regex Lab →

FAQs

What about PascalCase?

Use: ^[A-Z][a-z]+(?:[A-Z][a-z]*)*$ to require uppercase start.