The Number menu contains the following functions:
Number — Converts the argument to a number. For detailed information about the logic, see the XPath 1.0 specification.
Number Literal — Enables you to enter a number literal.
Round — Returns the number that is closest to the argument and that is an integer.
Sum — Returns the sum, for each node in the argument node-set, of the result of converting the string values of the node to a number.
Floor — Returns the largest number that is not greater than the argument and that is an integer.
Ceiling — Returns the smallest number that is not less than the argument and that is an integer.