Operation on String in Python

Python provides many built-in operations for working with strings. Here are some of the most commonly used string operations in Python:

1. String concatenation: To concatenate two or more strings, use the + operator.

Example:

python
s1 = "Hello"
s2 = "world"
s3 = s1 + s2
print(s3)  # Output: "Helloworld"

2. String indexing: You can access individual characters in a string using their index. In Python, string indices start from 0.

Example:

python
s = "Hello"
print(s[0])  # Output: "H"
print(s[1])  # Output: "e"

3. String slicing: To extract a substring from a string, use slicing. Slicing allows you to specify a range of indices to extract.

Example:

python
s = "Hello world"
print(s[0:5])  # Output: "Hello"
print(s[6:])   # Output: "world"

4. String formatting: You can insert values into a string using placeholders and the format method.

Example:

python
name = "Alice"
age = 30
print("My name is {} and I am {} years old".format(name, age))  # Output: "My name is Alice and I am 30 years old"

5. String methods: Python provides many built-in methods for working with strings, such as upper, lower, replace, split, and strip.

Example:

python
s = "  Hello World  "
print(s.upper())     # Output: "  HELLO WORLD  "
print(s.lower())     # Output: "  hello world  "
print(s.replace("o", "x"))  # Output: "  Hellx Wxrld  "
print(s.split())     # Output: ["Hello", "World"]
print(s.strip())     # Output: "Hello World"

These are just a few of the many string operations available in Python.