#    
## Overview
The **`index()` method** is used to find the index position of a character or sub-string in a string.
## Syntax
```perl
# for a character
index(string, char);
# for a sub-string
index(string, sub-string);
```
## Return value
This method returns the index position of the character `char` or the sub-string `sub-string` in the string `string`.

# get index positions of characters and sub-strings
print index("Educative is great", "E");     # 0
print("\n");
print index("Shots and authors", "s");      # 4
print("\n");
print index("Courses and students", "and"); # 8
print("\n");
print index("Perl is great!", "z");         # -1 not found

## Code explanation
* **Line 3**: We check the index of `E` in the string `Educative is great`. Then, we print the index that is returned.
* **Line 5**: We check the index of `s` in the string `Shots and authors` and print the returned value.
* **Line 7**: We check the index of `and` in the string `Courses and students` and print the returned value.
* **Line 9**: We check the index of `z` in the string `Perl is great` and print the returned value.


What is the index() method in Perl?

Overview

Syntax

Return value

Code explanation