Variadic Functions in Karel

Variadic functions can be called with any number of trailing arguments. For example, fmt.Println is a common variadic function.

Here is a function that will take an arbitrary number of ints as arguments.

def sum(*nums):
    print(nums, " ")
    total = 0
    
    for num in nums:
        total += num
    print(total)

def main():
    sum(1, 2)
    sum(1, 2, 3)

    nums = [1, 2, 3, 4]
    sum(*nums)

if __name__ == "__main__":
    main()

To run the program, save the code in a .py file and use the Python interpreter.

$ python3 variadic_functions.py
(1, 2)  
3
(1, 2, 3)  
6
(1, 2, 3, 4)  
10

Another key aspect of functions in Python is their ability to form closures, which we’ll look at next.

Next example: [Closures].