String In Python | What is String | Basic String Operations For Beginners

Published: 23 November 2023
on channel: SIT AND CODE

In Python, a string is a sequence of characters, like letters, numbers, symbols, or spaces, enclosed in either single quotes ('') or double quotes (""). For example:

my_string = "Hello, World!"

Strings can be manipulated using various operations. Here are some basic string operations in Python that are great for beginners:

Accessing Characters in a String:
You can access individual characters in a string by using their index positions. Python uses zero-based indexing, meaning the first character is at index 0. For example:

my_string = "Hello, World!"
print(my_string[0]) # Output: H
print(my_string[7]) # Output: W

String Length:
You can find the length of a string (the number of characters it contains) using the len() function:

my_string = "Hello, World!"
print(len(my_string)) # Output: 13

Using in:
The in operator checks if a substring exists within a string. It returns True if the substring is found and False otherwise.

my_string = "Hello, World!"

Checking for substring existence
print('Hello' in my_string) # Output: True
print('Hi' in my_string) # Output: False
print('World' in my_string) # Output: True

Using not in:
The not in operator checks if a substring doesn’t exist within a string. It returns True if the substring is not found and False if it is found.

my_string = "Hello, World!"

Checking for absence of substring
print('Hi' not in my_string) # Output: True
print('Hello' not in my_string) # Output: False

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