Python Program to print all permutations of a given string

Python Program to print all permutations of a given string; In this python tutorial, we would like to share with you two ways to find and print permutations of given string in python by using built-in module and without using any module.

Before we share with you program to find all permutations of the given string in python. You should know about the python itertools modules, because this module will help to find all permutations of given string.

permutation:- As we all know, the permutation is a way of organizing the elements of a group or set in a specific order or sequence that forms a separate group.

Python Program to print all permutations of a given string

• 1: Find all permutations of a string in Python
• 2: Python Program to Print all Permutations of a Given String without using Built-in Function

1: Find all permutations of a string in Python

Use the folloiwng steps and write a python program to print all permutations of a given string:

• First of all, import the permutation function from the python itertools module in program.
• Allow user to input the string and assign it in a variable.
• Use the permutation function to find all permutations and assign it in a variable.
• Since all elements are in tuple form. So, convert it in the list.
• At end of program, Print it which is our possible permutations.

# import the module
from itertools import permutations

# input the sting
str=input('Enter a string: ')

A=[]
b=[]
p=permutations(str)

for k in list(p):
    A.append(list(k))
    for j in A:
        r=''.join(str(l) for l in j)
        b.append(r)

print('Number of all permutations: ',len(b))

print('All permutations are: ')

print(b)

After executing the program, the output will be:

Enter a string:  cba
Number of all permutations:  21
All permutations are: 
['cba', 'cba', 'cab', 'cba', 'cab', 'bca', 'cba', 'cab', 'bca', 'bac', 'cba', 'cab', 'bca', 'bac', 'acb', 'cba', 'cab', 'bca', 'bac', 'acb', 'abc']

2: Python Program to Print all Permutations of a Given String without using Built-in Function

# conversion
def toString(List):
   return ''.join(List)
   
# find all permutations
def permuteFunc(a, l, r):
   if l == r:
      print (toString(a))
   else:
      for i in range(l, r + 1):
         a[l], a[i] = a[i], a[l]
         permuteFunc(a, l + 1, r)
         a[l], a[i] = a[i], a[l] # backtracking
         
# main
str=input('Enter a string: ')
n = len(str)
a = list(str)
print("The possible permutations are:",end="\n")
permuteFunc(a, 0, n-1)

After executing the program, the output will be:

Enter a string:  abc
The possible permutations are:
abc
acb
bac
bca
cba
cab

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