def pythagorus(num1, num2=0):
    """
    ### Description:
    
    Calculates the root-sum-of-square of two numbers
    
    ### Args:
    
    `num1`: The first number
        
    `num2`: The second number, default `0`
    
    ### Returns:
    
    The result of the **pythagorus** formula
    
    $$dist = \\sqrt { a^2+b^2 }$$
    """
    return (num1**2 + num2**2)**0.5