join usage and for loop usage

One: join usage

String iterating to add elements

s='dsfhhewfe'
s1='*'.join(s)
print(s1)

print result:

d*s*f*h*h*e*w*f*e

Two: String loop (used in conjunction with for loop, you can add break, continue)

1 for loop combined with break

for i in s:
    if i=='h':
        break
    print(i)

print result

2 for loop combined with continue

for i in s:
    if i=='h':
        continue
    print(i)

print result

 

Three: while and else are used together

while 1:
    pass
else:
    pass

Four: use for and else together

s='alkshfdfhg'
for i in s:
    if i=='h':
       continue
    print(i)
else:
    print('666')

print result