The average() function is implemented in python so that when the variable parameter length is 0, the result can be returned correctly.

1. Subject requirements:

The average() function is implemented in python so that when the variable parameter length is 0, the result can be returned correctly.

2. Come and show:

# Enter a code
def average(*args):
    sum = 0
    if len(args) == 0:
        return sum
    for item in args:
        sum += item
    avg = sum / len(args)
    return avg
print(average(1, 2)) 
print(average(1, 2, 2, 3, 4) )
print(average())

3. Operation results:

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