Erlang String substr Method

Erlang String

This method returns a substring of the original string based on the starting position and the number of characters at the starting position.

Syntax

substr(str1,start,number)

Parameters

• str1 −This is the string from which the substring needs to be extracted.

• Start −This is the starting position from which the substring should start.

• Number −This is the number of characters that need to appear in the substring.

Return Value

Returns a substring from the original string based on the starting position and length.

-module(helloworld).　
-import(string,[substr/3]).　
-export([start/0]).　
start()　->
　　　Str1　=　"hello　World",　
　　　Str2　=　substr(Str1,2,5),　
　　　io:fwrite("~p~n",[Str2]).

When we run the above program, we will get the following result.

"ello"

Erlang String