# hello world

message = "Hello World!"
print(message)

message = "What's your name?";
print(message)

message = 'my name is pigfly';
print(message.title())
print(message.upper())
print(message.lower())

first_name = 'zhu';
last_name = 'cheng hui';
print(first_name + ' ' + last_name)

username = 'pigfly ';
print(username.rstrip())

age=23
print("I'm "+str(age)+' years old.')