python program incorrect output about function

Question

def slove(numLegs, numHeads):
    for numChicks in range(0, numHeads + 1):
        numPigs = numHeads - numChicks
        totLegs = 4*numPigs + 2*numChicks
        if totLegs == numLegs:
            return [numPigs, numChicks]
        return [None, None]

I want to calcuate a number of numPigs and numChicks. I input slove(20,56), but the answer is None None. Could you tell me what's wrong with my program?

put return [None,None] outside for loop

Jay Parikh
– Jay Parikh

2017-07-21 08:31:52 +00:00
Commented Jul 21, 2017 at 8:31 — Jay Parikh
– Jay Parikh, Commented Jul 21, 2017 at 8:31

Jay Parikh · Accepted Answer · 2017-07-21 08:33:04Z

1

This should work !


def slove(numLegs, numHeads):
    for numChicks in range(0, numHeads + 1):
        numPigs = numHeads - numChicks
        totLegs = 4*numPigs + 2*numChicks
        if totLegs == numLegs:
            return [numPigs, numChicks]
    return [None, None]

answered Jul 21, 2017 at 8:33

Jay Parikh

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