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 b
say()
print(max(2,3))