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Formulas
Formulas are constructed by stringing together operators, values, and functions in a way that results in a single value. Different elements in the formula give different numbers of values:
Literal values, fields, and mathematical functions all result in one value
Relation functions can result in multiple values, depending on the number of issues that are involved
Operators or aggregating functions reduce multiple values into one
A formula must result in a single value, so subtasks('Quantity')
is invalid, but sum(subtasks('Quantity'))
is valid.
Literal values
You can use constant values in your formulas; their type is determined by their formatformat determines their type.
Number
To use a number constant, use the number itself, for example, 12000
or 42.86
.
Text
Text is required for certain functions. Text cannot be used to calculate something. To make a text value, use single quotes '
, for example 'this is a text'
or 'causes'
.
Fields
You can use any custom field of type number, or text fields that contain a number. JSU converts texts that only consist of a number to a number type.
To use a custom field, type its name, for example, Budget
or Quantity
.
Info 

If your field’s name contains spaces or special characters, you must surround it with double quotes, for example 
Operators
Operators combine two values. The following operators are supported:
Operator  Description  Example 

 Addition 

 Subtraction 

 Multiplication 

 Division 

 Potentiation: Raises the first value to the power of the second, e. g. 2^{8} 

 Percentage: As on a calculator, you can add or subtract a percentage to/from a value. 

Parentheses
Parentheses can be used to group operations to override operator precedence. 2 * 3 + 3
equals 9, but 2 * (3 + 3)
equals 12.
Functions
Functions are versatile. We provide the following types:
Mathematical functions enable more calculations.
Aggregating functions, allow you to combine multiple values into one; this is necessary to reduce the results of some relation functions.
Relation functions fetch values from other related issues so you can get values from subtasks, for example.
Note 

Jira automatically rounds values to three decimal places. Be careful when you need exact results. 
Mathematical Function  Description  Example  

 Rounds the passed value to the specified number of significant decimal digits. 
 
 Rounds the passed value to the nearest lower integer. 
 
 Rounds the passed value to the nearest higher integer. 
 
 Gives the absolute value, i. e. the positive value. 
 
 Normalises negative values to 1, zero to 0, and positive values to 1. 
 
 Calculates the remainder of the dividend when divided by the divisor. 
 
Aggregating Function  Description  Example  
 Sum of the passed values 
 
 Average of the passed values 
 
 Smallest of the passed values 
 
 Largest of the passed values 
 
Relation Function  Description  Example  
 Retrieves the values of the passed field from all subtasks.

 
 Retrieves the values of the passed field from the parent of a subtask. 
 
 Retrieves the values of the passed field from all issues in an epic.

 
 Retrieves the values of the passed field from the epic of an issue. 
 
 Retrieves the values of the passed field from all linked issues.


Advanced use cases
Setting a boundary on values
What if you must ensure the value of the Calculated Field “Price” stays above 0, but is at most 20? A minimum bound can be set by using max
and a maximum using min
. The price is calculated using the “Net Price” field and the “VAT” field.
First, we calculate the price, which can be done using
"Net Price” + VAT%
.We then want to set the upper bound of 20, so we get
min(”Net Price” + VAT%, 20)
.Finally, we need the lower bound, so we get
max(min(”Net Price”) + VAT%, 20), 1)
.
Ensuring entered numbers are integers
You have a field requesting the “Number of Participants” on a transition screen. Your subsequent calculations require this number to be a whole number. To ensure this, you use a Calculated Field post function on the same transition.
The post function will write to the “Number of Participants” field.
We want to operate on the same field, so we start with the formula
“Number of Participants”
.We then want to ensure that it is a whole number; we do this by rounding. We round up in this case:
ceiling(”Number of Participants”)
.
If the number is already a whole number, it is unchanged. If someone enters 15.3
for example, it is rounded up to the next whole number, and we get 16
.
Because we write the result to the same field during the transition, i. e. “Number of Participants”, the same field is adjusted with a whole number input.
Multiple values
The mathematical functions can also operate on the multiple values that are returned by the relation functions. For example, you can round all the values returned by a subtask.
avg(round(subtasks('Number of Affected Systems'), 0))
The functions accept the lists in the following ways:
round(number_list, decimals)
floor(number_list)
ceiling(number_list)
abs(number_list)
signum(number_list)
mod(dividend_list, divisor)
The function is then applied to each element in the list, and a list with the new values is returned. The mathematical functions do not reduce the list in size; the only way to do that is to use an aggregating function.
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