Write an expression that will cause the following code to print "I am a teenager" if the value of userAge is less than 20.
import java. Util. Scanner;
public class AgeChecker {
public static void main (String [] args) {
int userAge;
scanner scnr = new Scanner(System. In);
userAge = scnr. NextInt(); // Program will be tested with values: 18, 19, 20, 21.
if (/ *Your solution goes here*/ ) {
System. Out. Println("I am an adult");
}
else {
System. Out. Println("I am a teenager");
}
}
}
