璁＄畻 1 - 2 + 3 -4 + 5... + 99 涓櫎浜?88浠ュ鎵€鏈夋暟鐨勬€诲拰

Posted 2021-01-10

鏍囩锛?a href='http://www.mamicode.com/so/1/%e7%ac%a6%e5%8f%b7' title='绗﹀彿'>绗﹀彿   div   鍒濆   闄や簡   else   寰幆   class   bsp   浜х敓   

i=1
sum=0
while i <100:
    if i == 88:
        i += 1
        continue
    if i %2 != 0: # 濂囨暟鍔?/span>
        sum = sum+i
    else:
        sum = sum-i # 鍋舵暟鍑?/span>
    i += 1
print(sum)

#璁＄畻 1 - 2 + 3 - 4 + 5 ...-89 + 90.... -99 涓櫎浜?88浠ュ鎵€鏈夋暟鐨勬€诲拰
i = 0  # 鍒濆鍊?/span>
j = -1  # 绗﹀彿
sum = 0  # 姹傚拰
while i < 99:
    i += 1
    if i == 88:
        continue
    else:
        j = -j   # 杩涘叆寰幆浣撶鍙蜂骇鐢熷姝ｅ彉鍖?/span>
        sum += i*j
print(sum)