In exams2forms: Embedding 'exams' Exercises as Forms in 'rmarkdown' or 'quarto' Documents

Question

Enter any valid (syntactically correct) e-mail address.

Solution

An e-mail address consists of a local-part, followed by the @ symbol, and a domain name. The local part may use latin letters (upper- and/or lower-case), numbers, and certain symbols like a . or _ etc. The domain name also allows numbers and letters but fewer symbols and needs to have a . separating the top-level domain.

The regular expression used for validation is:

^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}$

which covers the most important (but not quite all) rules that an e-mail address has to satisfy. For more details see https://en.wikipedia.org/wiki/Email_address.

Meta-information

exname: E-mail address validation via regex extype: string exsolution: ^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$

exams2forms documentation built on May 9, 2025, 3 a.m.