Python Program to Check Whether a String is a Palindrome or not

A string is said to be a palindrome if the string read from left to right is equal to the string read from right to left.

method 1:-

# function which return reverse of a string

def isPalindrome(s):
	return s == s[::-1]


# Driver code
s = "malayalam"
ans = isPalindrome(s)

if ans:
	print("Yes")
else:
	print("No")

output:

Yes

method 2:

def isPalindrome(string):
    left_pos = 0
    right_pos = len(string) - 1
 
    while right_pos >= left_pos:
        if not string[left_pos] == string[right_pos]:
            return False
        left_pos += 1
        right_pos -= 1
    return True
print(isPalindrome('12121'))

output:-

True

method 3:-

x = "lol"

w = ""
for i in x:
	w = i + w

if (x == w):
	print("Yes")
else:
	print("No")

output:-

Yes

method 4:-

def check(x) :
    if x[  -1 : - len(x) - 1  : -  1] == x:
        print ("String is a palindrome.")
    else :
        print ("String is not a palindrome ")

string = input ("Enter a String :- ")
check(string)

output:-

Enter a String :- lolPlease enter your own String : lol
This is a Palindrome String
>>>