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1.死循环
while 1 == 1: print('ok')
结果是一直循环
2.循环
count = 0 while count < 10: print(count) count = count +1 print(error)
3.练习题
~ 使用while循环输出1 2 3 4 5 6 8 9 10
count = 1 while count <= 10 : # 或者count < 11 if count == 7: print( ) # 也可以添加pass,什么也不执行 else: print(count) count = count + 1
执行结果:
1 2 3 4 5 6 8 9 10 process finished with exit code 0
~ 求1-100的所有数的和
a = 1 b = 0 while a < 101: b = b + a a = a + 1 print(b)
输出结果:
5050 process finished with exit code 0
~求1-100内所有的奇数
n = 1 while n < 101: js = n % 2 if js == 0: print( ) else: print(n) n = n + 1
输出结果:
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99
~ 求1-100内所有的偶数
a = 1 while a < 101: b = a % 2 if b == 0: print(a) else: pass a = a + 1
输出结果:
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 process finished with exit code 0
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