substring method
The substring method returns
a substring from a string (the
original string is not changed). The
first parameter specifies the number
of the character where the method
starts cutting (numbering starts from
zero), and the second parameter is the
number of the character where the
cutting should end (the character with
this number is not included in the cut
substring). The second parameter is
optional, if it is not specified, then
all characters up to the end of the
string will be cut.
Syntax
string.substring(where to start, [where to stop]);
Example
Let a string be given. Let's cut out the characters from the first to the third:
let str = 'abcde';
let sub = str.substring(1, 3);
console.log(sub);
The code execution result (character
numbered 3 will not be included
in the substring):
'bc'
Example
Let's now cut out the characters
from 1st to the end of a
string (for this, we will not set
the second parameter of the method):
let str = 'abcde';
let sub = str.substring(1);
console.log(sub);
The code execution result:
'bcde'