Python Strings Tutorial

Python strings are a versatile data type that allow you to store textual information. Python strings are immutable, which means once created, their value cannot be altered. In this tutorial, we will look at how you can perform various operations on strings, such as creation, slicing, and manipulation.

Table of Contents

1. Creating Strings
2. Accessing Elements
3. String Concatenation
4. String Length
5. String Methods
6. String Formatting

1. Creating Python Strings

You can create a string by enclosing text within single quotes (' ') or double quotes (" ").

# Using single quotes
str1 = 'Hello, World!'
print(str1)

# Using double quotes
str2 = "Hello, World!"
print(str2)

Output:

Hello, World!
Hello, World!

2. Accessing Python Strings Elements

Strings are indexed, and you can access individual characters using square brackets [].

str3 = "Python"
print(str3[0])  # Output: P
print(str3[-1]) # Output: n

3. String Concatenation

You can concatenate two or more strings using the + operator.

str4 = "Hello" + " " + "World!"
print(str4)  # Output: Hello World!

4. String Length

To find the length of a string, you can use the len() function.

str5 = "Python"
length = len(str5)
print(length)  # Output: 6

5. String Methods

Python provides various methods to manipulate and work with strings.

5.1 upper() and lower()

str6 = "Python"
print(str6.upper())  # Output: PYTHON
print(str6.lower())  # Output: python

5.2 strip()

str7 = "  Python  "
print(str7.strip())  # Output: Python

5.3 replace()

str8 = "Python is fun!"
print(str8.replace("fun", "awesome"))  # Output: Python is awesome!

6. String Formatting

You can use various techniques to format strings in Python. More examples on string formatting

6.1 Using f-strings

name = "Alice"
print(f"Hello, {name}!")  # Output: Hello, Alice!

6.2 Using .format()

name = "Bob"
print("Hello, {}!".format(name))  # Output: Hello, Bob!

This is just the tip of the iceberg when it comes to Python’s string capabilities. By mastering these basics, you’ll be well on your way to becoming proficient at string manipulation in Python.