Rrc en 22:01 30 sep 2014

2014-09-30T22:01:17Z

Página nueva

<h3>Crear Funciones</h3>
a = 23
b = -23

def absolute_value( n ):
if n < 0:
n = -n
return n

if absolute_value( a ) == absolute_value( b ):
print( "El valor absoluto de", a, "y", b, "son igual." )
else:
print( "El valor absoluto de", a, "y", b, "son diferentes." )

Lo que sigue:
El valor absoluto de 23 y -23 son igual.

def hola( ):
print( "Hola" )

def area( ancho, altura ):
return ancho * altura

def print_bienvenido( nombre):
print( "Bienvenido", nombre )

hola( )
hola( )

print_bienvenido( "Miguel")
w = 4
h = 5
print( "ancho =", w, " height =, h, " area =", area( w, h ))

Lo que sigue:

Hola
Hola
Bienveenido Miguel
ancho = 4 altura = 5 areá = 20

<h3>Variables in functions</h3>

a = 4

def print_func( ):
a = 17
print( "en print_func a = ", a)

print_func( )
print( "a = ", a)

Lo que sigue:

in print_func a = 17
a = 4

a_var = 10
b_var = 15
e_var = 25

def a_func( a_var ):
print( "en a_func a_var = ", a_var )
b_var = 100 + a_var
d_var = 2 * a_var
print( "en a_func b_var = ", b_var )
print( "en a_func d_var = ", d_var )
print( "en a_func e_var = ", e_var )
return b_var + 10
c_var = a_func( b_var )
print( "a_var = ", a_var )
print( "b_var = ", b_var )
print( "c_var = ", c_var )
print( "d_var = ", d_var )

Lo que Sigue:

in a_func a_var = 15
in a_func b_var = 115
in a_func d_var = 30
in a_func e_var = 25
a_var = 10
b_var = 15
c_var = 125
d_var =

Traceback (most recent call last):
File "C:\def2.py", line 19, in <module>
print("d_var = ", d_var)
NameError: name 'd_var' is not defined

<h3>temperature2.py</h3>
#!/usr/bin/python3
#-*-coding: utf-8 -*-
# convertir temperatura en Fahrenheit a Celsius

def print_options( ):
print( "Options:" )
print( " 'p' print options" )
print( " 'c' convert from Celsius" )
print( " 'f' convert from Fahrenheit" )
print( " 'q' quit the program" )

def celsius_to_fahrenheit( c_temp ):
return 9.0 / 5.0 * c_temp + 32

def fahrenheit_to_celsius( f_temp ):
return ( f_temp - 32.0 ) * 5.0 / 9.0

choice = "p"
while choice != "q":
if choice == "c":
c_temp = float( input( "Celsius temperature: " ) )
print( "Fahrenheit:", celsius_to_fahrenheit( c_temp ) )
choice = input( "option: " )
elif choice == "f":
f_temp = float( input( "Fahrenheit temperature: " ) )
print( "Celsius:", fahrenheit_to_celsius( f_temp ) )
choice = input( "option: " )
elif choice == "p": #Alternatively choice != "q": so that print when anything unexpected inputed
print_options( )
choice = input( "option: " )

Lo que sigue:

Options:
'p' print options
'c' convert from celsius
'f' convert from fahrenheit
'q' quit the program
option: c
Celsius temperature: 30
Fahrenheit: 86.0
option: f
Fahrenheit temperature: 60
Celsius: 15.5555555556
option: q

area2.py
<div dir="ltr" class="mw-geshi mw-code mw-content-ltr">
<div class="python source-python">
<pre class="de1">
#! /usr/bin/python
#-*-coding: utf-8 -*-
# calculates a given rectangle area

def hello():
print('Hello!')

def area(width, height):
return width * height

def print_welcome(name):
print('Welcome,', name)

def positive_input(prompt):
number = float(input(prompt))
while number <= 0:
print('Must be a positive number')
number = float(input(prompt))
return number

name = input('Your Name: ')
hello()
print_welcome(name)
print()
print('To find the area of a rectangle,')
print('enter the width and height below.')
print()
w = positive_input('Width: ')
h = positive_input('Height: ')

print('Width =', w, ' Height =', h, ' so Area =', area(w, h))
</pre></div>
</div>
Sample Run:
<pre>
Your Name: Josh
Hello!
Welcome, Josh

To find the area of a rectangle,
enter the width and height below.

Width: -4
Must be a positive number
Width: 4
Height: 3
Width = 4 Height = 3 so Area = 12
</pre>

Curso de Programación en Python/CrearFunciones - Historial de revisiones

Rrc en 22:01 30 sep 2014