例（1）
count_1 = True
while count_1:
    print(‘1‘)
    print(‘2‘)
    count_1 = False
print(‘3‘)

例（2）
count_1 = True
while count_1:
    print(‘1‘)
    print(‘2‘)
    count_1 = False
print(‘3‘)

例（3）
count_1 = 1
count_2 = True
while count_2:
    print(count_1)
    if count_1 == 100:
        count_2 = False
    count_1 +=1
print(‘end.....‘)


例（4）
count_1 = 1
while count_1:
    print(count_1)
    if count_1 == 100:
        break #跳出当前循环
    count_1 +=1
print(‘end.....‘)

例（5）
while True:
    print(‘123‘)
    continue#结束本次循环跳到下一次循环
    pritn(‘456‘)
print(‘end.....‘)

例（3）
count_1 = 0
while True:
    if count_1 == 6 or count_1 == 3:
        count_1 += 1
        continue
    print(count_1)
    count_1 += 1
    if count_1 == 10:
        break
print(‘end.....‘)