Hellow guys, Welcome to my website, and you are watching Prog. Basics 1 | How do Input, Output, and SELECTION (IF/CASE) work? | O/AS Level | By ZAK. and this vIdeo is uploaded by Zafar Ali Khan (ZAK) at 2023-12-19T08:49:25-08:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.