"""
Returns sum of five numbers
:param num1: int
:param num2: int
:param num3: int
:param num4: int, optional.
:param num5: int, optional.
:return: int result of sum of the five input parameters
"""
def params(num1, num2, num3, num4 = 4, num5 = 5):
    return(num1 + num2 + num3 + num4 + num5)
