In Python, defining or declaring string variables is a straightforward process. Here’s how you can define string variables:

1. Explicit Declaration:

# Using single quotes
name_single_quotes = 'John'

# Using double quotes
name_double_quotes = "Alice"

# Using triple quotes for multi-line strings
multi_line_string = '''This is a
multi-line string.'''

2. Implicit Declaration:

In Python, you don’t need to explicitly declare the variable type. Python is dynamically typed, meaning you can assign values to variables without specifying their type.

name = "Bob"

3. Concatenation:

You can concatenate strings using the + operator:

first_name = "John"
last_name = "Doe"

full_name = first_name + " " + last_name
print(full_name)

Output:

John Doe

4. String Interpolation (Formatted Strings):

Use f-strings (formatted strings) for dynamic string creation:

age = 25
message = f"My name is {name} and I am {age} years old."
print(message)

Output:

My name is Bob and I am 25 years old.

5. String Methods:

Python provides various string methods for manipulating strings. Here’s an example using the upper() method:

text = "hello world"
uppercase_text = text.upper()
print(uppercase_text)

Output:

HELLO WORLD

6. Escape Characters:

You can include special characters using escape characters:

escaped_string = "This is a line with a new\nline."
print(escaped_string)

This is a line with a new
line.

These examples cover the basics of defining and manipulating string variables in Python. Remember that Python is dynamically typed, so you don’t need to explicitly declare the variable type, and you can easily perform various operations on strings using built-in methods.