a = 3
b = 4
c = a + b
d = a * b
print("a = ", a)
print("b = ", b)
print("c = ", c)
print("d = ", d)
# 格式化输出 {}就是占位符  python类型有 布尔、int、float[int和float为数值型]、str[字符串]、list[列表]、tuple[元组]、set[集合]、dict[字典]
# list 特点   lst = [1,2,3]
# tuple特点   tup = (1,2,3)
# set 特点    set = {1,2,3}
# 字典 特点    dic = {"age":18,"name":"mayia"} #键值对
age = 18
print("今年我的年龄是 {} 岁". format(age))

print("age类型是 {} ".format(type(age)))