Extract characters from a string:
var res = str.substring(1, 4);
More "Try it Yourself" examples below.
Definition and Usage
The substring() method extracts the characters from a string, between two specified indices, and returns the new sub string.
This method extracts the characters in a string between "start" and "end", not including "end" itself.
If "start" is greater than "end", this method will swap the two arguments, meaning str.substring(1, 4) == str.substring(4, 1).
If either "start" or "end" is less than 0, it is treated as if it were 0.
Note: The substring() method does not change the original string.
|start||Required. The position where to start the extraction. First character is at index 0|
|end||Optional. The position (up to, but not including) where to end the extraction. If omitted, it extracts the rest of the string|
|Return Value:||A new String containing the extracted characters|
Begin the extraction at position 2, and extract the rest of the string:
var res = str.substring(2);
If "start" is greater than "end", it will swap the two arguments:
var res = str.substring(4, 1);
If "start" is less than 0, it will start extraction from index position 0:
var res = str.substring(-3);
Extract only the first character:
var res = str.substring(0, 1);
Extract only the last character:
var res = str.substring(str.length - 1, str.length);