零基础学python之while语句问么用

1、n = 0while n < 5: print('good') n += 1print('end')

2、print('计算1加到100的值。')n = 1 # 循环条件res = 0 # 记录累加的结果while n <= 100: res += n n += 1print(res)

3、print('打印100以内所有能被7整除的数')n = 1while n <= 100: if n % 7 == 0: print(n, end=' ') n += 1print('**end**')

4、print('给定一个字符言射鐾钤串，判断字符串中有多少个数字字符')s = 'a1b2c3..sdf3t'n = len(s) - 1res = 0while n >= 0: if '0' <= s[n] <= '9': res += 1 n -= 1print(res)

5、print('给定一个整数，计算出这个数有多少位')n = 1801res =0while n > 0: n //= 10 res += 1print(res)

6、print('打印出2000-2100所有的闰年')year = 2000whil髫潋啜缅e year <= 2100: if year % 400 == 0 or (year % 4 == 0 and year % 100 != 0): print(year, end=' ') year += 1print()

7、while的else和continue用法，请看下一篇经验。