>>> def sum1(start, end): ... n = 0 ... for i in xrange(start, end+1): n += i ... return n # return文で値を返す ... >>> sum1(1, 10) 55 >>> sum1(start=1, end=10) # "仮引数名=実引数"で引数を渡す（キーワード引数） 55 >>> sum1(end=10, start=1)…