02 C VBA Syntax for Do While / Do Until Loop, Input from Excel sheet

1. When you need to write do while / do until loop
2. Syntax of do while / until loop
3. How to take input from excel sheet for program execution
4. How to ensure variable names are correct before execution of program

[hk]

Mr. Gopal, congratulations, your explanation is very clear and useful for those like me with no programming experience. Thank you.