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