Erlang - put

This method is used to add a key value pair to the map.

Syntax

put(key1,value1,map1)

Parameters

• key1 − This is key which needs to be added to the map.

• Value1 − This is the value associated with key1 which needs to be added to the map.

• map1 − This is map to which the key value needs to be added.

Return Value

The original map with the added key value.

For example

-module(helloworld). 
-export([start/0]). 

start() -> 
   Lst1 = [{"a",1},{"b",2},{"c",3}], 
   Map1 = maps:from_list(Lst1), 
   io:fwrite("~p~n",[maps:put("d",4,Map1)]).

Output

The output of the above program is as follows −

#{"a" => 1,"b" => 2,"c" => 3,"d" => 4}