def add(a : float, b : float) ->float:
    '''Function adds two numbers and returns the sum as a float.'''
    return float(a + b)

def sub(a : float, b : float) ->float:
    '''Function subtracts b from and returns the difference as a float.'''
    return float(a - b)

def mult(a : float, b : float) ->float:
    '''Function multiplies two numbers and returns the product as a float.'''
    return float(a * b)

def div(a : float, b : float) ->float:
    '''Function divides two numbers and returns the quotient as a float.
        It will also check if the divisor is 0 and flag an error and return a
        large negative float if this is true.'''
    try:
        return a / b
    except ZeroDivisionError:
        print("Unable to Divide By Zero")
        return -9999999999999.9

def mod(a : float, b : float) ->float:
    return float(a % b)

def exp(a : float, b : float) ->float:
    return float(a ** b)