Top 10 useful examples for Python string data type

Here are 10 code examples to explain the usage of the string data type:

1. String data type Initialization

Strings can be initialized using single, double, or triple quotes.

str1 = 'Hello, World!'
str2 = "Python is fun."     
str3 = '''Multi-line
string in Python.'''
print(str1)
print(str2)
print(str3)

2. String Concatenation

Use the + operator to concatenate strings.

first_name = "John"
last_name = "Doe"
full_name = first_name + " " + last_name
print(full_name)  # John Doe

3. String Repetition

Use the * operator to repeat a string multiple times.

repeat_str = "ha" * 3
print(repeat_str)  # haha

4. Indexing of String Data Type

Strings can be indexed to fetch characters at specific positions. Negative indexing starts from the end.

text = "Python"
print(text[0])   # P
print(text[-1])  # n

5. String Slicing

Extract a portion of the string using slicing.

text = "programming"
slice1 = text[1:4]  # "rog"
slice2 = text[:4]   # "prog"
slice3 = text[4:]   # "ramming"
print(slice1, slice2, slice3)

6. String Length

Use the len() function to get the length of a string.

message = "Hello, World!"
length = len(message)
print(length)  # 13

7. String Methods

Strings come with built-in methods for various operations.

text = "hello world"
capitalized = text.capitalize()
upper_case = text.upper()
is_alpha = text.isalpha()
print(capitalized)  # Hello world
print(upper_case)   # HELLO WORLD
print(is_alpha)     # False (because of space)

8. String Formatting

Format strings using the format() method or f-strings (Python 3.6+).

name = "Alice"
age = 28
formatted_str1 = "{} is {} years old.".format(name, age)
formatted_str2 = f"{name} is {age} years old."
print(formatted_str1)
print(formatted_str2)

9. Escape Characters

Use backslashes to escape special characters in strings.

sentence = "She said, \"Python is my favorite language!\""
print(sentence)

10. Multi-line Strings and Raw Strings

Triple quotes allow for multi-line strings. Use r or R prefix for raw strings (ignores escape characters).

multi_line = '''This is a 
multi-line 
string.'''
print(multi_line)

path = r"C:\Users\Name\Documents"
print(path)  # C:\Users\Name\Documents

These examples showcase various operations and features of strings in Python. Strings are versatile and come with numerous built-in methods that make text manipulation easy.