python 学习

1.声明

a = 2

b = 3

c =a + b;

2.判断

if a>3 :

       print("hahah")

3.循环

for i in range(0,100):    print（i）

4 字符串拼接

for i in range(0,100):    print("item {0}{1}".format(i,"hello world"))

5函数声明与调用

def say():    print("hello world")def max(a,b):    if a>b :        return a    else:        return bsay()print(max(2,3))