Sum the Even Values of a String

Question

In this Exercise, you will sum the value of a string. Complete the recursive function

def sumString(st):

This function accepts a string as a parameter and sums the ASCII value for each character whose ASCII value is an even number.

I know how to sum all the values but the even numbers part is challenging.

def  sumString(st):
     if not st:
        return 0
     else:
        return ord(st[0]+sumString(st[1:])]

I tried something but i am just confused at this point.

def  sumString(st):
     if not st:
        return 0
     t=[ord(st[0]),sumString(st[1:])]
     for item in t:
         if item%2==0:
            return item+t

Answer 1

Maybe something like this?

def sumString(st):
    if not st:
        return 0
    else:
        out = ord(st[0]) if ord(st[0]) % 2 == 0 else 0
        return out + sumString(st[1:])
        

print(sumString("abcd"))

Output:

198

The ASCII value for b is 98 and the ASCII value for d is 100. So 100 + 98 gives you the output.