math

Synopsis

math('math_function')

Table 1. Legend
Syntax conventions	Description
Lowercase and uppercase	Literal keyword. Includes `()`.
`Italics`	Variable value. Replace with a user-defined value.
`[]`	Optional. Square brackets ( `[]` ) surround optional command arguments. Do not type the square brackets.
`{}`	Group. Braces ( `{}` ) identify a group to choose from. Do not type the braces.
`\|`	Or. A vertical bar ( `\|` ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.
`...`	Repeatable. An ellipsis ( `...` ) indicates that you can repeat the syntax element as often as required.

The math() step enables scientific calculator functionality. The basic operations ( +, -, *, /, ^, and %) are available, as well as:


Function	Description
abs	absolute value
acos	arc cosine
asin	arc sine
atan	arc tangent
cbrt	cubic root
ceil	nearest upper integer
cos	cosine
cosh	hyperbolic cosine
exp	Euler's number raised to the power e^x
floor	nearest lower integer
log	natural logarithm (base e)
log10	logarithm (base 10)
log2	logarithm (base 2)
sin	sine
sinh	hyperbolic sine
sqrt	square root
tan	tangent
tanh	hyperbolic tangent
signum	signum function

Find the calories per meal item, then multiply by the number of servings for a meal:

g.V().hasLabel('meal_item').as('a').
   inE('includes').as('b').
   math('a*b').
      by('calories').
      by('numServ')

Note that two by() statements are used to retrieve a particular property for each math variable used, calories for a and numServ for b.