Function returns nothing rather than the expected value "None"

Question

I have no return put into my function, so I thought it should return "None". Instead, it simply does not return anything. Can someone tell me why? All help appreciated!

def posdivisor(n):
    for i in range(1,n+1):
        if n % i == 0:
            print(i)

someValue = eval(input("Enter an integer: "))

posdivisor(someValue)

THE SHELL REPORTS:

Enter an integer: 49
1
7
49

Answer 1

Because your code just print data, the function return a None, and you ignore it, try to print out will see None:

def posdivisor(n):
    for i in range(1,n+1):
        if n % i == 0:
            print(i)

someValue = eval(input("Enter an integer: "))

result = posdivisor(someValue)
print result

Besides, you don't need eval() here, just input() will be ok if you can insure that input is always number:

def posdivisor(n):
    for i in range(1,n+1):
        if n % i == 0:
            print(i)

someValue = input("Enter an integer: ")

result = posdivisor(someValue)
print result