def add(num1, num2):

    return num1 * num2


def main():
    print(add(1,1))
    print(add(2,4))
    print(add(10,10))

main()

I dont understand why this code can get the two arguments from the main(). Can you call the function by print? Otherwise I can not figure out why it is working.

I try to use debugger but still dont understand. so hope to get the answer here, thanks!!