What are strings? Strings are text - any characters inside quotes. Python doesn’t care if you use single or double quotes, just be consistent.
name = "Alice" message = 'Hello, World!' Creating strings Three ways to make strings:
# Single quotes first = 'Python' # Double quotes second = "Python" # Triple quotes for multiple lines paragraph = """This is a multi-line string""" Use double quotes when your text contains apostrophes: "It's Python!"
Combining strings Join strings together with +:
first_name = "John" last_name = "Doe" # Concatenation full_name = first_name + " " + last_name print (full_name) # John Doe # Repetition stars = "*" * 5 print (stars) # ***** String length Use len() to count characters:
message = "Hello" print ( len (message)) # 5 empty = "" print ( len (empty)) # 0 Converting to string Turn other types into strings with str():
age = 25 message = "I am " + str (age) + " years old" print (message) # I am 25 years old # Or use f-strings (we'll learn more later) message = f "I am { age } years old" Common mistakes
# Wrong - mismatched quotes text = "Hello' # Right - matching quotes text = "Hello" text = 'Hello'
Can't add strings and numbers
# Wrong result = "Age: " + 25 # TypeError! # Right - convert number first result = "Age: " + str ( 25 )
Forgetting quotes entirely
# Wrong name = Alice # Python looks for variable Alice # Right name = "Alice" # String literal What’s next? Let’s explore True/False values - essential for making decisions in your code!
Booleans True and False values
