String reverse in python; Through this tutorial, i am going to show you how to reverse string using function, for loop, recursion and without function in python.
There are many way to reverse a string in python. In this tutorial, i will show you simple 5 ways to reverse string in python.
How to Reverse String in Python
Use the following 5 methods to reverse a string in Python; As shown in the list below:
- 1: Reverse string in python using for loop
- 2: Python reverse string using slicing
- 3: Python reverse string using recursion
- 4: Reverse a string using while loop in python
- 5: Reverse a string using reversed() function in python
1: Reverse string in python using for loop
See the following python program to reverse a string using for loop; as shown below:
# Python program to reverse a string
# using for loop
def reverse(s):
str = ""
for i in s:
str = i + str
return str
str = "Python World"
print ("Given string is : ",end="")
print (str)
print ("Reversed string using loops is : ",end="")
print (reverse(str))
Output
Given string is : Python World Reversed string using loops is : dlroW nohtyP
2: Python reverse string using slicing
See the following python program to reverse a string using slicing:
# Python program to reverse a string
# using slice
# Function to reverse a string
def reverse(string):
string = string[::-1]
return string
str = "Python World"
print ("Given string is : ",end="")
print (str)
print ("Reversed string using extended slice is : ",end="")
print (reverse(str))
Output
Given string is : Python World Reversed string using extended slice is : dlroW nohtyP
3: Python reverse string using recursion
See the following python program to reverse a string using recursion:
# Python program to reverse a string
# using recursion
def reverse(s):
if len(s) == 0:
return s
else:
return reverse(s[1:]) + s[0]
str = "Python World"
print ("Given string is : ",end="")
print (str)
print ("Reversed string using recursion is : ",end="")
print (reverse(str))
Output
Given string is : Python World Reversed string using recursion is : dlroW nohtyP
4: Reverse a string using while loop in python
See the following python program to reverse a string using while loop:
# Python program to reverse a string
# using while loop
def reverse_string(input):
string = ""
length = len(input) - 1
while length >= 0:
string = string + input[length]
length = length - 1
return string
str_data = 'My world'
print ("Given string is :" + str_data)
if __name__ == "__main__":
print('Reverse String using While Loop =', reverse_string(str_data))
Output
Given string is :My world Reverse String using While Loop = dlrow yM
5: Reverse a string using reversed() function in python
See the following python program to reverse a string using while loop:
def rev_str_thru_join_revd(STR):
return "".join(reversed(STR))
INPUT_STRING = "My world"
if __name__ == '__main__':
print("INPUT STRING -", INPUT_STRING)
print("RESERVED STRING THROUGH JOIN & REVERSED", rev_str_thru_join_revd(INPUT_STRING))
Output
Given string is :My world Reverse String using While Loop = dlrow yM