String Operation in Python

 Python provides a rich set of built-in functions and methods for performing various operations on strings. Here are some commonly used operations on strings in Python:

1. Concatenation: To concatenate two or more strings, use the + operator or the join() method.

python
str1 = "Hello"
str2 = "World"
result1 = str1 + " " + str2  # using the + operator
result2 = "".join([str1, " ", str2])  # using the join() method
print(result1)  # Output: "Hello World"
print(result2)  # Output: "Hello World"

2. Substring: To extract a substring from a string, use slicing or the split() method.

python
my_string = "Hello, World!"
substring1 = my_string[0:5]  # using slicing
substring2 = my_string.split(",")[0]  # using the split() method
print(substring1)  # Output: "Hello"
print(substring2)  # Output: "Hello"

3. Length: To get the length of a string, use the len() function.

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

4. Replace: To replace a substring with another substring, use the replace() method.

python
my_string = "Hello, World!"
new_string = my_string.replace("World", "Python")
print(new_string)  # Output: "Hello, Python!"

5. Case conversion: To convert a string to uppercase or lowercase, use the upper() and lower() methods.

python
my_string = "Hello, World!"
uppercase = my_string.upper()
lowercase = my_string.lower()
print(uppercase)  # Output: "HELLO, WORLD!"
print(lowercase)  # Output: "hello, world!"

These are just a few of the many operations that can be performed on strings in Python.