Take input of string reverse the strring in python?

Answer 1

There are five common methods of string inversion in Python: using string slicing, using recursion, using the list reverse () method, using stack and using for loop.

1. Use string slicing (most concise)

s = "hello"

reversed_ s = s[::-1]

print(reversed_s)

>>> olleh

2. Use recursive def reverse_ it(string):

if len(string)==0:

return string

else:

return reverse_ it(string[1:]) + string[0]

print "added " + string[0]

string1 = "the crazy programmer"

string2 = reverse_ it(string1)

print "original = " + string1

print "reversed = " + string2

3. Use the list reverse() method in [25]: l = ['a', 'B', 'C','d ']

...: l.reverse()

...: print (l)

['d', 'c', 'b', 'a']

4. Using stack def Rev_ string(a_string):

L = list (a_string) # simulate all stacking

new_ string = ""

while len(l)>0:

new_ String + = l.pop() # simulate stack out

return new_ string

5. Use the for loop #for loop

def func(s):

r = ""

max_ index = len(s) - 1

for index,value in enumerate(s):

r += s[max_index-index]

return r

r = func(s)

The above are the five common methods of string inversion in Python. I hope it can be helpful to your learning of Python strings