$4\mathrm{.}3\mathrm{.}2$: Bidding example.

Write an expression that continues to bid until the user enters $\text{'}$n$\text{'}.$

Sample output with inputs: $\text{'}$y$\text{'}\text{'}$y$\text{'}\text{'}$n$\text{'}$

Write a while loop that prints user$\_$num divided by $2$ until user$\_$num is less than $1.$ The value of user$\_$num changes inside of the loop.

Write a while loop that prints user$\_$num divided by $2$ until user$\_$num is less than $1.$ The value of user$\_$num changes inside of the loop.

Write an expression that executes the loop body as long as the user enters a non$-$negative number.