Python：循环控制：break、continue、pass

Python 循环控制：break、continue、pass

break: 跳出 整个 for 循环
continue: 跳出 此次 循环
pass: 什么都不做，仅仅是个占位符

str = 'positive'
cont = 0
for i in str:
    cont += 1
    if i == 't':
        break
    print i
print 'count: %d' % cont

p
o
s
i
count: 5

str = 'positive'
cont = 0
for i in str:
    cont += 1
    if i == 't':
        continue
    print i
print 'count: %d' % cont

p
o
s
i
i
v
e
count: 8

str = 'positive'
cont = 0
for i in str:
    cont += 1
    if i == 't':
        pass
    print i
print 'count: %d' % cont

p
o
s
i
t
i
v
e
count: 8