This function increases the value under key a in a map c by the value b. Note: If the initial value in the map is not numeric, it is converted to "0".

The return value of the function is the value of b converted to the type "BigDecimal".

Parameters

Parameter	Description
a	Key of the value.
b	The value to be added.
c	(optional) Name of the map. Default: "default".
d	(optional) "true", if only values without set Empty Flag should be used in b. Default: "false".

Example

The example entries are to be seen as called in sequence. The value under key "mykey" in map "mymap" is initially "0".

Parameter a	Parameter b	Parameter b empty?	Parameter c	Parameter d	Result	Value in map
mykey	123	No	mymap		123	123
mykey	123	No	mymap		123	246
mykey	123	Yes	mymap		123	369
mykey	123	Yes	mymap	false	123	492
mykey	123	Yes	mymap	true	123	492