学习python

1.函数调用定义。

def sayHello():
print ('Hello World!')
sayHello()

2.函数形参

def printMax(a,b):
if (a>b):
print ( a, 'is maximum')
if (a<b):
print ( b, 'is maximum')
printMax (3,4)

3.局部变量和全局变量

def func(x):
print ('x is',x)
x=2
print ('Changed local x to', x)
x= 50
func(x)
print ('x is still' ,x )