apoc.atomic.add
Procedure

Details
Syntax	`apoc.atomic.add(container, propertyName, number [, retryAttempts ]) :: (container, property, oldValue, newValue)`
Description	Sets the given property to the sum of itself and the given `INTEGER` or `FLOAT` value. The procedure then sets the property to the returned sum.
Input arguments	Name	Type	Description
	`container`	`ANY`	The node or relationship that contains the property to which the value will be added.
	`propertyName`	`STRING`	The name of the property whose value will be added to.
	`number`	`INTEGER \| FLOAT`	The number to add.
	`retryAttempts`	`INTEGER`	The max retry attempts. The default is: `5`.
Return arguments	Name	Type	Description
	`container`	`ANY`	The updated node or relationship.
	`property`	`STRING`	The name of the updated property.
	`oldValue`	`ANY`	The original value on the property.
	`newValue`	`ANY`	The new value on the property.

Usage examples

The examples in this section are based on the following sample graph:

CREATE (:Person {name:'Tom',age: 40})
CREATE (:Person {name:'Will',age: 35})
CREATE (:Person {name:'David', children: ['Anne','Sam','Paul']})
CREATE (:Person {name:'John', cars: ['Class A','X3','Focus']})
CREATE (:Person {name:'Ryan', salary1:1800, salary2:1500});

The following adds 10 to the property age for Tom:

MATCH (n:Person {name:'Tom'})
CALL apoc.atomic.add(n,'age',10,5)
YIELD oldValue, newValue
RETURN oldValue, newValue;

Results
oldValue	newValue
40	50

More documentation of apoc.atomic.add