Rounding in Python.

Question

How would I round 'com' in this Python code?

def percentage(com,rd):
    apl = [10,10,10,5,5,20,10,10,10,10]
    if age > 15:
        t=sum(apl)
    if age < 15:
        t=sum(apl) + 10
    com=rd/t*100
    *round(com,0)*
    return com

Answer 1

Pretty fine, except that you have to store the returned value somewhere:

def percentage(rd):
    apl = [10,10,10,5,5,20,10,10,10,10]
    if age > 15:
        t=sum(apl)
    if age < 15:
        t=sum(apl) + 10
    com=rd/t*100 #this overwrites whatever the passed argument com was.
    com = round(com,0) #assign the rounded value back to com
    return com

Also, you don't actually need com as a parameter, since you assigned it in the function.

Hope this helps!

Answer 2

com = round(com,0)

round is a function that just returns a value, does not modify the variable you provide it. You have to assign that value yourself.

Answer 3

You probably want the round function. Say you wanted to round it to the nearest ten:

>>> i = 222
>>> print round(i, -1)
220.0