python-004(while循环)
1 案例一: 2 ks = 1 3 while True: 4 print(ks) 5 if ks == 10: 6 break 7 ks = ks + 1 8 print("end") 9 10 11 12 案例二: 13 while True: 14 print('123') 15 break 16 print('456') 17 18 19 while True: 20 print('123') 21 continue 22 print('456') 23 24 # break:用于跳出当前循环,并且brrak下面的代码,将不再执行。 25 # continue: 用于跳出本次循环,继续下一次循环。 26 27 案例三: 28 # 求1-100的所有数的和 29 start = 1 30 31 while True: 32 print(start) 33 if start == 100: 34 break 35 start +=1 36 37 案例四: 38 # 输出 1-100内所有的偶数 39 start = 1 40 41 while start <= 100: 42 if start%2 == 0: 43 print(start) 44 start += 1 45 46 案例五: 47 # 输出1-100 内所有的奇数 48 start = 1 49 50 while start <= 100: 51 if start%2 == 1: 52 print(start) 53 start += 1 54 55 案例六: 56 # 打印1,2,3,4,5,6,8,9,10 57 start =1 58 while True: 59 if start == 7: 60 start += 1 61 continue 62 print(start) 63 if start == 10: 64 break 65 #start = start + 1 66 start +=1