問題描述

#!/usr/bin/env python3# -*- coding: utf-8 -*-’N個數字的平均值’N = 3sum = 0count = 0while count < N: num = float(input(’number:’)) sum = num + sum count += 1average = sum / Nprint(type(sum))print('N: %s, sum: %d ,average: %.2f' % (N, sum, average))print('N:{}, sum:{} ,average：{:.2f}'.format(N, sum, average))# print('N:{}, sum:{:d} ,average：{:.2f}'.format(N, sum, average))

最后注釋掉的那一行報錯，ValueError: Unknown format code ’b’ for object of type ’float’我想把sum，例如60.0這樣的浮點數，整數輸出

問題解答

試下這個

print('N:{}, sum:{:.0f} ,average：{:.2f}'.format(N, sum, average))