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