Hi guys! Just want to ask why in this code the radius is 8 even though there is no input from the user?

Question

No input but there is an output...
https://code.sololearn.com/ccl7Fn4Mn9PK/?ref=app

Answer 1

'int r' is a local variable, which is not initialized. So, initially it will have garbage value. In your case value in 'int r' is 8.

If u still have the doubt, print 'int r' value before updating using scanf ().