Getting substring from specific index to index in Python

In this tutorial, we will learn how to Get a substring from a specific index to an index in Python in python with a simple and easy example.

In Python, you can extract a substring from a string by specifying the start and end indexes using the slice notation. This method gives you fragments based on where the string is. Here is a detailed explanation of how to get a substring from a particular index to another.

Syntax

The general syntax for slicing a string is:

substring = original_string[start_index:end_index]

• start_index : The position where the substring begins (inclusive).
• end_index : The position where the substring ends (exclusive).

How It Works

1. Inclusive Start: The character at start_index  is included in the substring.
2. Exclusive End: The character at end_index is not included in the substring.

Examples

Example 1: Basic Substring Extraction

Suppose you have the following string, and you want to move the substring from index 2 to index 5.

original_string = "Hello, World!"
substring = original_string[2:5]
print(substring)  # Output: "llo"

• start_index is 2, so the substring starts from the character at index 2 (“l”).
• end_index is 5, so the substring ends just before the character at index 5 (“o”).
• The resulting substring is “llo”.

Example 2: Omitting Start Index

You can omit the start index to extract a substring from the beginning of the string to a specific index:

original_string = "Hello, World!"
substring = original_string[:5]
print(substring)  # Output: "Hello"

• No start_index means it defaults to the beginning of the string.
• end_index is 5, so the substring includes characters from the start up to index 5 (exclusive).
• The resulting substring is “Hello”.

Example 3: Omitting End Index

You can omit the end index to extract a substring from a specific index to the end of the string:

original_string = "Hello, World!"
substring = original_string[7:]
print(substring)  # Output: "World!"

• start_inex is 7, so the substring starts from the character at index 7 (“W”).
• No end_index means it goes to the end of the string.
• The resulting substring is “World!”.