i dont understand why the a and out are null??

Replies to This Discussion

Permalink Reply by Mostapha Sadeghipour Roudsari on October 19, 2012 at 7:21pm

Hi Carcassi,  watch your Indentation!

 

def a(b,c,d):

     return(blah blah)

# no indentation here

x = a(2,3,4)

print (x)

-Mostapha

Permalink Reply by Anders Holden Deleuran on October 20, 2012 at 4:06am

What Mostapha said, your lacking indentation means that your def isn't actually called. Hence "out" is empty because you're not actually printing anything. Also "a" is null because it is not assigned to anything in your script.  

On a more important note, you have a def called "a" and an output variable called "a" plus you have an input variable called "x" which you then reassign to whatever the def returns! This causes confusion and errors (logical errors that is), consider naming variables and defs so that they are meaningful and unique.