Number functions
The value of the constant e (the base of the natural logarithm, equal to 2.7182818) raised to the power of a specified number. Any math functions contained within the specified expression to the specified digits of precision, if the math function supports extended precision. One of three possible values: -1 when the specified number is negative, 0 when it's zero, and 1 when it's positive. A number truncated to the specified precision (number of decimal places), without evaluating the value of the discarded digits.