Python入门教程(十九)python的函数详解

def my_function():
  print("Hello from a function")

def my_function():
  print("Hello from a function")

my_function()

Hello from a function

def my_function(fname):
  print(fname + " Gates")

my_function("Bill")
my_function("Steve")
my_function("Elon")

Rory John Gates
Jennifer Katharine Gates
Phoebe Adele Gates

def my_function(country = "China"):
  print("I am from " + country)

my_function("Sweden")
my_function("India")
my_function()
my_function("Brazil")

I am from Sweden
I am from India
I am from China
I am from Brazil

def my_function(food):
  for x in food:
    print(x)

fruits = ["apple", "banana", "cherry"]

my_function(fruits)

apple
banana
cherry

def my_function(x):
  return 5 * x

print(my_function(3))
print(my_function(5))
print(my_function(9))

15
25
45

def my_function(child3, child2, child1):
  print("The youngest child is " + child3)

my_function(child1 = "Phoebe", child2 = "Jennifer", child3 = "Rory")

The youngest child is Rory

def my_function(*kids):
  print("The youngest child is " + kids[2])

my_function("Phoebe", "Jennifer", "Rory")

The youngest child is Rory

def myfunction:
  pass

def tri_recursion(k):
  if(k>0):
    result = k+tri_recursion(k-1)
    print(result)
  else:
    result = 0
  return result

print("\n\nRecursion Example Results")
tri_recursion(6)

Recursion Example Results
1
3
6
10
15
21