Erlang Map keys Method

Erlang Map

This method is used to return all keys from the map.

Syntax

keys(map)

Parameters

• map −This is the map that needs to return all keys.

Return Value

Return the list of keys in the map.

-module(helloworld).　
-export([start/0]).　
start()　->　
　　　Lst1　= [{"a",1},{"b",2},{"c",3}],　
　　　Map1　= maps:from_list(Lst1)),　
　　　io:fwrite("~p~n",[maps:keys(Map1)]).

Output Result

The output of the above program is as follows.

["a","b","c"]

Erlang Map