NOTE: in mathematics, the square root of a negative number is not real; in Java therefore, passing such a value to the square root function returns a value known as NaN (not-a-number).
Given a double variable named areaOfSquare write the necessary code to read in a value , the area of some square, into areaOfSquare and print out the length of the side of that square.
HOWEVER: if any value read in is not valid input, just print the message “INVALID”.
ASSUME the availability of a variable , stdin, that references a Scanner object associated with standard input.
areaOfSquare = stdin.nextDouble(); if (areaOfSquare < 0) System.out.print("INVALID"); else System.out.print(Math.sqrt(areaOfSquare));