Arithmetic Operators

Operator	Description	Example
$trunc	Truncates a number down to an integer.	{"$trunc": "c_value"}
$sqrt	Takes the square root of an aggregated number.	{"$sqrt": {"$add": "c_value"}}
$ln	Takes the log of a number.	{"$ln": "c_number"}
$floor	Returns the largest integer less than or equal to the number	{"$floor": "c_number"}
$exp	Takes the e^n of a number	{"$exp": "c_number"}
$ceil	Returns the smallest integer greater than or equal to the specified number.	{"$ceil": "c_number"}
$abs	Takes the absolute value of a number.	{"$abs": "c_number"}
$add	Adds two or more array properties or expressions. In addition to numbers, a single Date value may be included in the array.	{"$add": ["created", "c_msOffset"]}
$multiply	Multiplies two or more number properties or expressions in the passed in array.	{"$multiply": ["c_bpm", "c_scalar", {"$number": 0.99}]}
$subtract	Subtracts the second element from the first in the passed in array. In addition to number properties, numbers and dates maybe be subtracted from a date value.	{"$subtract": ["created", "updated"]}
$divide	Divides the second element by the first in the passed in array.	{"$divide": ["c_bpm", {"$number": 0.9}]}
$mod	Divides the second element by the first in the passed in array, and returns the remainder.	{"$divide": ["c_bpm", {"$number": 20}]}
$pow	Raises the first number to the power of the second number.	{"$pow": ["c_heartrate", {"$number": 2}]}
$log	Takes the log of the first number in the second number's base.	{"$log": [100, 10]}