what is the condition, of an amount n of numbers? in a while loop

Answer 1

//plzz explain with an example , i will try to answer if i know

Answer 2

//sorry , i can't understand what u want ... try giving an suitable example

Answer 3

a loop that asks for the number of n numbers, and tell me the largest to 20 and 30. of the whole amount. then what would be the condition to stop, until I decide?