Erlang - Lists


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The List is a structure used to store a collection of data items. In Erlang, Lists are created by enclosing the values in square brackets.

Following is a simple example of creating a list of numbers in Erlang.

Example

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

start() -> 
   Lst1 = [1,2,3], 
   io:fwrite("~w~n",[Lst1]).

The output of the above example will be −

Output

[1 2 3]

Let us now discuss the various methods available for Lists. Note that the lists library needs to be imported for these methods to work.

Sr.No Method and Description
1

all

Returns true if Pred(Elem) returns true for all elements Elem in List, otherwise false.

2

any

Returns true if Pred(Elem) returns true for at least one element Elem in List.

3

append

Returns a new list List3 which is made from the elements of List1 followed by the elements of List2.

4

delete

Deletes an element from the list and returns a new list.

5

droplast

Drops the last element of a List.

6

duplicate

Returns a list which contains N copies of the term Elem

7

last

Returns the last element of the list

8

max

Returns the element of the list which has the maximum value.

9

member

Checks if an element is present in the list or not.

10

min

Returns the element of the list which has the minimum value.

11

merge

Returns the sorted list formed by merging all the sub-lists of ListOfLists.

12

nth

Returns the Nth element of List.

13

nthtail

Returns the Nth tail of the List.

14

reverse

Reverses a list of elements.

15

sort

Sorts a list of elements.

16

sublist

Returns a sublist of elements.

17

sum

Returns the sum of elements in the list.



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