x=10

y=4

print (x/y,x//y)

z = 12.34 + 34j 

print (z.imag)

x = 12.34

print (type (x))

hex(255)

x = 0x0101 

print (x)

 def change (a,b):

a = 10

b += a 

a = 4

b = 5

change (a,b)

print (a,b)

def fact (n):

if n == 0:

return 1

else:return n*fact (n - 1)

num = eval (input ("请输入一个整数："))

print (fact (abs (int (num))))

 def fun1 (a):

a = 10

b = 2f

un1 (b) 

print (b)

def area (r, pi = 3.14159):

return pi * r * r 

area (3.14, 4)

 n = 1

def func (a,b):

c = a * b 

return cs = func ("Hello",2)

 print (c)