2. For problem # 1, when the user entered a negative number, you output a message that it was not possible to take the square root of a negative number. This time you will write a Python program that asks the user to enter a non-negative number (float). If the user does enter a negative number, you will use a while loop to continue prompting the user until you get a valid number (i.e. a number >= 0). Once the user enters a valid number, you calculate and print the square root. Test your program twice, once using a negative number and once using a non-negative number.

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