Program to check the number is Palindrome or not

Given an integer N, write a program that returns true if the given number is a palindrome, else return false.

Examples:

```Input: N = 2002
Output: true

Input: N = 1234
Output: false
```

Recommended: Please solve it on “PRACTICE ” first, before moving on to the solution.

Approach:
A simple method for this problem is to first reverse digits of n, then compare the reverse of n with n. If both are same, then return true, else false.

Below is the implementation of the above approach:

C++

 `// C program to check whether a number ` `// is Palindrome or not. ` ` `  `#include ` ` `  `/* Iterative function to reverse digits of num*/` `int` `reverseDigits(``int` `num) ` `{ ` `    ``int` `rev_num = 0; ` `    ``while` `(num > 0) { ` `        ``rev_num = rev_num * 10 + num % 10; ` `        ``num = num / 10; ` `    ``} ` `    ``return` `rev_num; ` `} ` ` `  `/* Function to check if n is Palindrome*/` `int` `isPalindrome(``int` `n) ` `{ ` ` `  `    ``// get the reverse of n ` `    ``int` `rev_n = reverseDigits(n); ` ` `  `    ``// Check if rev_n and n are same or not. ` `    ``if` `(rev_n == n) ` `        ``return` `1; ` `    ``else` `        ``return` `0; ` `} ` ` `  `/*Driver program to test reversDigits*/` `int` `main() ` `{ ` `    ``int` `n = 4562; ` `    ``printf``(``"Is %d a Palindrome number? -> %s\n"``, n, ` `           ``isPalindrome(n) == 1 ? ``"true"` `: ``"false"``); ` ` `  `    ``n = 2002; ` `    ``printf``(``"Is %d a Palindrome number? -> %s\n"``, n, ` `           ``isPalindrome(n) == 1 ? ``"true"` `: ``"false"``); ` `    ``return` `0; ` `} `

Java

 `// Java program to check whether a number ` `// is Palindrome or not. ` ` `  `class` `GFG ` `{ ` `    ``/* Iterative function to reverse digits of num*/` `    ``static` `int` `reverseDigits(``int` `num) ` `    ``{ ` `        ``int` `rev_num = ``0``; ` `        ``while` `(num > ``0``) { ` `            ``rev_num = rev_num * ``10` `+ num % ``10``; ` `            ``num = num / ``10``; ` `        ``} ` `        ``return` `rev_num; ` `    ``} ` `     `  `    ``/* Function to check if n is Palindrome*/` `    ``static` `int` `isPalindrome(``int` `n) ` `    ``{ ` `     `  `        ``// get the reverse of n ` `        ``int` `rev_n = reverseDigits(n); ` `     `  `        ``// Check if rev_n and n are same or not. ` `        ``if` `(rev_n == n) ` `            ``return` `1``; ` `        ``else` `            ``return` `0``; ` `    ``} ` `     `  `    ``/*Driver program to test reversDigits*/` `    ``public` `static` `void`  `main(String []args) ` `    ``{ ` `        ``int` `n = ``4562``; ` `        ``System.out.println(``"Is"` `+ n + ``"a Palindrome number? -> "` `+ ` `            ``(isPalindrome(n) == ``1` `? ``"true"` `: ``"false"``)); ` `     `  `        ``n = ``2002``; ` `         `  `        ``System.out.println(``"Is"` `+ n + ``"a Palindrome number? -> "` `+ ` `            ``(isPalindrome(n) == ``1` `? ``"true"` `: ``"false"``)); ` ` `  `    ``} ` ` `  `} ` ` `  `// This code is contributed  ` `// by Hritik Raj ( ihritik ) `

Python3

 `# Python3 program to check whether a  ` `# number is Palindrome or not.  ` ` `  `# Iterative function to reverse ` `# digits of num ` `def` `reverseDigits(num) :  ` ` `  `    ``rev_num ``=` `0``;  ` `    ``while` `(num > ``0``) : ` `        ``rev_num ``=` `rev_num ``*` `10` `+` `num ``%` `10` `        ``num ``=` `num ``/``/` `10` `     `  `    ``return` `rev_num  ` ` `  `# Function to check if n is Palindrome ` `def` `isPalindrome(n) : ` ` `  `    ``# get the reverse of n  ` `    ``rev_n ``=` `reverseDigits(n);  ` ` `  `    ``# Check if rev_n and n are same or not.  ` `    ``if` `(rev_n ``=``=` `n) : ` `        ``return` `1` `    ``else` `: ` `        ``return` `0` ` `  `# Driver Code ` `if` `__name__ ``=``=` `"__main__"` `: ` ` `  `    ``n ``=` `4562` `     `  `    ``if` `isPalindrome(n) ``=``=` `1` `: ` `        ``print``(``"Is"``, n, ``"a Palindrome number? ->"``, ``True``) ` `         `  `    ``else` `: ` `        ``print``(``"Is"``, n, ``"a Palindrome number? ->"``, ``False``) ` ` `  `    ``n ``=` `2002` `     `  `    ``if` `isPalindrome(n) ``=``=` `1` `: ` `        ``print``(``"Is"``, n, ``"a Palindrome number? ->"``, ``True``) ` `         `  `    ``else` `: ` `        ``print``(``"Is"``, n, ``"a Palindrome number? ->"``, ``False``) ` ` `  `# This code is contributed by Ryuga `

C#

 `// C# program to check whether a number ` `// is Palindrome or not. ` ` `  `using` `System; ` `class` `GFG ` `{ ` `    ``/* Iterative function to reverse digits of num*/` `    ``static` `int` `reverseDigits(``int` `num) ` `    ``{ ` `        ``int` `rev_num = 0; ` `        ``while` `(num > 0) { ` `            ``rev_num = rev_num * 10 + num % 10; ` `            ``num = num / 10; ` `        ``} ` `        ``return` `rev_num; ` `    ``} ` `     `  `    ``/* Function to check if n is Palindrome*/` `    ``static` `int` `isPalindrome(``int` `n) ` `    ``{ ` `     `  `        ``// get the reverse of n ` `        ``int` `rev_n = reverseDigits(n); ` `     `  `        ``// Check if rev_n and n are same or not. ` `        ``if` `(rev_n == n) ` `            ``return` `1; ` `        ``else` `            ``return` `0; ` `    ``} ` `     `  `    ``/*Driver program to test reversDigits*/` `    ``public` `static` `void`  `Main() ` `    ``{ ` `        ``int` `n = 4562; ` `        ``Console.WriteLine(``"Is"` `+ n + ``"a Palindrome number? -> "` `+ ` `            ``(isPalindrome(n) == 1 ? ``"true"` `: ``"false"``)); ` `     `  `        ``n = 2002; ` `         `  `        ``Console.WriteLine(``"Is"` `+ n + ``"a Palindrome number? -> "` `+ ` `            ``(isPalindrome(n) == 1 ? ``"true"` `: ``"false"``)); ` ` `  `    ``} ` ` `  `} ` ` `  `// This code is contributed  ` `// by Hritik Raj ( ihritik ) `

PHP

0)
{
\$rev_num = \$rev_num * 10 +
\$num % 10;
\$num = \$num / 10;
}
return \$rev_num;
}

// Function to check if n is Palindrome
function isPalindrome(\$n)
{

// get the reverse of n
\$rev_n = reverseDigits(\$n);

// Check if rev_n and n are same or not.
if (\$rev_n == \$n)
return 1;
else
return 0;
}

// Driver Code
\$n = 4562;
echo “Is “, \$n , ” a Palindrome number? ->”;

if(isPalindrome(\$n) == 1)
echo “true” ;
else
echo “false”;
echo “\n”;

\$n = 2002;
echo “Is “, \$n , ” a Palindrome number? ->”;
if(isPalindrome(!\$n))
echo “true” ;
else
echo “false”;

// This code is contributed by jit_t
?>

Output:

```Is 4562 a Palindrome number? -> false
Is 2002 a Palindrome number? -> true
```

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