Passing a link in a function?


#1

Continuing the discussion from Passing a range into a function:

I'm not sure if I'm doing this right, my code is:

def my_function(x):
    for i in range(0, len(x)):
        x[i] = x[i] * 2
    return x

print my_function(range(0, 1, 2)) # Add your range between the parentheses!

#2

@kingmarcus,

def my_function(x):
    print "range(start, stop[, step])"
    print "Argument given is: "+ str(x)
    print "Length of argument given is: " +str(len(x))
    for i in range(0, len(x)):
        print i
    return True
'''
        x[i] = x[i] * 2
        return x
'''
print my_function(range(0, 1, 2))
# Add your range between the parentheses!
# print range(0, 1, 2)
print "======================="
my_function(range(0, 12, 2))

gives output

range(start, stop[, step])
Argument given is: [0]
Length of argument given is: 1
0
True
=======================
range(start, stop[, step])
Argument given is: [0, 2, 4, 6, 8, 10]
Length of argument given is: 6
0
1
2
3
4
5
nice to know

You could test in labs.codecademy.com
choose Python
You will get a split-screen
In the left-hand-side you paste-in your code
click on the Run button.
The right-hand-side is the console

-------------------------------

From a google search
== the Book ==
python builtin function site:python.org
https://docs.python.org/2/library/functions.html

== discussions by // opininons of millions of programmers ==
python usage of range() site:stackoverflow.com
= http://stackoverflow.com/questions/1738109/how-does-the-pythons-range-function-work


#3

@kingmarcus,

+++ function talk

the FUNCTION talk

def myFunc( param1, param2):
    # Begin of =myFunc= FUNCTION-BODY
    # this =myFunc= function- has 2 PARAMETERS param1 and param2
    # param1 and param2 PARAMETERS are used 
    # as -local- VARIABLES throughout the =myFunc= FUNCTION-BODY
    print( param1 + " and " + param2 )
    #End of =myFunc= FUNCTION-BODY

If you want to call/execute the myFunc function
you will have to add a pair of parentheses to myFunc
like
myFunc()
As the myFunc function was defined
as having 2 parameters
you have to provide 2 arguments
in our case 2 string VALUES "Alena" and "Lauren"
like
myFunc("Alena","Lauren")

some quotes from the outer-world:

**argument is the value/variable/reference being passed in,
parameter is the receiving variable used within the function/block**

OR

**"parameters" are called "formal parameters",
while "arguments" are called "actual parameters".**

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++ function with 1 parameter using return-statement

def myFunction( param1 ):
    # //Begin of =myFunction= FUNCTION-BODY
    # //=myFunction= function has 1 PARAMETER param1
    # //this param1 PARAMETER is used as a -local- VARIABLE
    # //throughout the =myFunction= FUNCTION-BODY
    return param1;
    # //End of FUNCTION-BODY

You have defined a myFunction function
which takes 1 parameter param1
this param1 parameter is used
as a variable throughout the =myFunction= FUNCTION-BODY.

If you want to call/execute this myFunction function
and this myFunction function was defined
as having 1 parameter param1
you will have to provide 1 argument
in our case a "number VALUE" 4
myFunction( 4 )

some quotes from the outer-world:

**argument is the value/variable/reference being passed in,
parameter is the receiving variable used within the function/block**

OR

**"parameters" are called "formal parameters",
while "arguments" are called "actual parameters".**

============================================

As you are using the return-statement in your myFunction function
you will only get a return-value no-display.
You can however capture this return-value in a variable
and then use the print-method to do a display.

theResult = myFunction( 4 )
print theResult

OR directly

print myFunction( 4 )