Write an expression that executes the loop while the user enters a number greater than or equal to $0.$

Note: These activities may test code with different test values. This activity will perform three tests, with user input of $9,5,2,-1,$ then with user input of $0,-17,$ then with user input of $010-1.$ See "How to Use zyBooks".

Also note: If the submitted code has an infinite loop, the system will stop running the code after a few seconds, and report "Test aborted."

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public class NonNegativeLooper $\{$

public static void main $($String $[]$ args$)\{$

Scanner scnr $=$ new Scanner$($

System.in$)$;

int userNum;

userNum $=$ scnr$.$ nextInt $()$ ;

while $C^{**}$ Your solution goes here $*$D $\{$

System.out.println$("$Body$")$;

$\}$

userNum $=$ scnr$.$ nextInt $()$;

System.out.println$("$Done$.")$;

$\}$

$\}$