The sign() CSS function contains one calculation, and returns -1 if the Numeric value of the argument is negative, +1 if the Numeric value of the argument is positive, 0⁺ if the Numeric value of the argument is 0⁺, and 0⁻ if the Numeric value of the argument is 0⁻....calculation, and returns -1 if the numeric value of the argument is negative...negative, +1 if the numeric value of the argument is positive...