username = 'xiaoming'
age =18
hello =f'我的名字叫{username},今年{age}岁'
print(hello)
print(username.upper())
print(len(username))
dXNlcm5hbWUgPSAneGlhb21pbmcnCmFnZSA9MTgJCQpoZWxsbyA9ZifmiJHnmoTlkI3lrZflj6t7dXNlcm5hbWV977yM5LuK5bm0e2FnZX3lsoEnCnByaW50KGhlbGxvKQpwcmludCh1c2VybmFtZS51cHBlcigpKQpwcmludChsZW4odXNlcm5hbWUpKQ==