Strings

message = "Hello, world!"
print(message)  # Output: "Hello, world!"
Hello, world!

print(message[0])  # Output: "H"
print(message[7])  # Output: "w"
H
w

print(len(message))  # Output: 13 (length of the string)

print(message.upper())  # Output: "HELLO, WORLD!" (converts to uppercase)

print(message.replace("Hello", "Hi"))  # Output: "Hi, world!" (replaces a substring)

print(message.split(","))  # Output: ["Hello", " world!"] (splits the string into a list)
13
HELLO, WORLD!
Hi, world!
['Hello', ' world!']

message = "Hello?"
print(message[0])  # Outputs: H
message[0] = "J"   # This results in an error
H

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[4], line 3
      1 message = "Hello?"
      2 print(message[0])  # Outputs: H
----> 3 message[0] = "J"   # This results in an error

TypeError: 'str' object does not support item assignment
greeting = "Hello"
name = "John"
message = greeting + " " + name
print(message)  # Output: "Hello John"
Hello John

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