What is the method for extracting a substring from a string?

There are several methods for extracting substrings from a string:

1. The substring() method is used with two parameters to specify the starting and ending positions of the substring (ending position is not included).
   For example: str.substring(startIndex, endIndex);
2. Utilize the slice() method: this method is similar to the substring() method, taking two parameters to specify the starting and ending positions of the substring (excluding the character at the ending position). For example: str.slice(startIndex, endIndex);
3. To use the substr() method, you need to provide two parameters: the first one is the starting position of the substring and the second one is the length of the substring. For example: str.substr(startIndex, length);
4. The split() method is used to split a string into an array of strings, separating the string into multiple substrings based on the specified separator.
   For example: str.split(separator);
5. Regular expressions can be used to extract substrings that match a specific pattern. For example, you can use str.match(regexp).

The substring(), slice(), and substr() methods are used to extract consecutive substrings, while the split() method and regular expressions are used to extract non-consecutive substrings. The specific method chosen depends on the specific requirements.