Why Do Ice Skates Hurt The Arch Of My Foot

10) The functions PART 1

Functions are blocks of code repeated. Let's see how you define a function:

 
  # / usr / bin / python  
 
   final test   ( )  :   # def initialize and are used with: 
    print "hello world  "  # code from the function 
 
   test () # function call   
 

What's up? with final test (): you create a function is defined by final you give a name test () and using the : in the name of the function using the brackets () because they contain (if you need) the parameters, the code that comes after print "hello world" is unique code of the function means that if the function is invoked test () that code will not run.

Let's see how to use two or more functions together

 
  # / usr / bin / python  
 
   final test   ()  :   # define a function: 
   print    "hello world  "    # codice contenuto nella funzione 
  
     def   linea  ()    :     #definisce una funzione 
     print    #linea vuota 
  
     def   due  ()    :     #definisce una funzione 
     linea  ()     #chiamata alla funzione linea() 
     prova  ()     #chiamata alla funzione prova() 
     linea  ()      #chiamata alla funzione linea() 
  
   due    ()   #chiamata alla funzione 
  

Output:

  
  bash-3.1 $ python prova.py  
 
  hello world  
 
  bash-3.1 $ 
  

What's happening? re-reading the code we can find that we call the function * only * two () But she draws the first line () where your code will print a blank line, then test () , which prints hello to video world, then again line () and we will have a blank line.

* * TO REMEMBER:
function calls must have the ().
USE identity