Write a code segment that asks the user to enter a non$-$negative number $($x $0)$ and

then reads the number from the keyboard. Use either a while loop or a do$-$while loop to

ensure valid input. That is$,$ your code segment should ask the user to enter a non$-$

negative number and then read the number from the keyboard until a non$-$negative

number is entered.

$2.$ Write a while loop that lets the user enter a number. The number should be multiplied

by $10,$ and the result stored in the double variable product. The loop should iterate as

long as product contains a value less than $100.$