# 整数
print(9);
print( 9 - 2);
print(9 + 2);
print(9 / 2);
print(9 * 2);
# **表示乘方
print(9 ** 2);


# 浮点数

print(0.2 + 0.2);
print(0.2 + 0.1);


age = 22;
message = "Hello" + str(age);
print(message)





