Different between HTML abd XHTML
XHTML (Extensible HyperText Markup Language) is a family of XML markup languages that mirror or extend versions of the widely used Hypertext Markup Language (HTML), the language in which web pages are written. Extended version of HTMLthat is stricter and XML-based. Source - https://www.diffen.com/difference/HTML_vs_XHTML
what @qwerty said is spot on
I have made a calculator in which my % (Percentage) not work correctly for 100%50 or 100%20.
Python palindrome challenge.
Number of Ones ( C++ ) question!