# Check Palindrome String ## Write a program to check palindrome string Palindrome string is a string that is same when read from left to right and right to left. For example, "aba" is a palindrome string, "abc" is not. ```txt Input : abba Output : Palindrome String ``` --- ```c #include #include int main() { int i, j; char str[20] = "abba"; j = strlen(str) - 1; while (i <= j) { if (str[i] != str[j]) { printf("Not a Palindrome String"); return 0; } else { i++; j--; } } printf("Palindrome String"); return 1; } ``` ```cpp #include using namespace std; bool isPal (string text) { int n = text.length (); for (int i = 0; i < n / 2; i++) { if (text[i] != text[n - i - 1]) return false; } return true; } int main () { string text = "abba"; if (isPal (text)) { cout << "Palindrome String" << endl; return 0; } else { cout << "Not a Palindrome String" << endl; return 1; } return 1; } ``` ```csharp using System; namespace palindromecheck { class Program { static void Main(string[] args) { string string1, rev; Console.WriteLine ("Please enter a string : "); string1 = Console.ReadLine(); char[] ch = string1.ToCharArray(); Array.Reverse(ch); rev = new string(ch); bool b = string1.Equals(rev, StringComparison.OrdinalIgnoreCase); if (b == true) { Console.WriteLine("" + string1 + " is a Palindrome!"); } else { Console.WriteLine(" " + string1 + " is not a Palindrome!"); } Console.Read(); } } } ``` ```java import java.util.Scanner; public class CheckPalindromeString { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(System.in); String str = sc.next(); int i = 0; int j = str.length() - 1; boolean check = true; sc.close(); while (i <= j) { if (str.charAt(i) != str.charAt(j)) { check = false; break; } i++; j--; } System.out.println((check) ? "Palindrome String" : "Not Palindrome String"); } } ``` ```javascript function checkPalindromeString(str) { const reverseStr = [...str].reverse().join(""); return str === reverseStr; } console.log( checkPalindromeString("abba") ? "Palindrome String" : "Not Palindrome String", ); ``` ```kotlin fun main() { print("Input : ") println() var input = readLine() println("Is $input palindrome : " + CheckPalindromeString(input!!)) } private fun CheckPalindromeString(inputStr: String): Boolean { val sb = StringBuilder(inputStr) //reverse the string val reverseStr = sb.reverse().toString() //compare reversed string with input string return inputStr.equals(reverseStr, ignoreCase = true) } ``` ```ruby print "Please enter a string: " input_string = gets.chomp def checkPalindromeString string if string.downcase == string.reverse.downcase "Palindrome String" else "Not Palindrome String" end end print checkPalindromeString input_string ``` ```swift import Swift import Foundation func checkPalindrome(str: String) -> Bool { var reversedString = String(str.reversed()) return str == reversedString } var str1 = "abba" var result1 = checkPalindrome(str: str1) print("Is String - \(str1) is palindrome?:", result1) var str2 = "abba123" var result2 = checkPalindrome(str: str2) print("Is String - \(str2) is palindrome?:", result2) ``` ```typescript const checkPalindromeString = (text: string) => { text = text.toLowerCase(); const n = text.length; let low = 0; let high = n - 1; while (high > low) { if (text[high] != text[low]) { return false; } low++; high--; } return true; }; /** * Test Case 1: * text = "abba" */ const string = "abba"; if (checkPalindromeString(string)) { console.log("Palindrome String"); } else { console.log("Not a Palindrome String"); } ``` ```julia function is_palindrome(str) cleaned_str = lowercase(strip(str)) return cleaned_str == reverse(cleaned_str) end # Example usage: input_str = "abba" if is_palindrome(input_str) println("$input_str is a palindrome.") else println("$input_str is not a palindrome.") end ``` ```scala object HelloWorld { def main(args: Array[String]): Unit = { val word = scala.io.StdIn.readLine(); val reverseWord = reverse(word); if(reverseWord == word) { println("Palindrome") } else { println("Not a Palindrome") } } def reverse(s: String): String = { if (s.isEmpty) "" else reverse(s.tail) + s.head } } ``` ```dart bool checkPalin(String s){ int l = 0; int r = s.length - 1; while(l < r){ if(s[l] != s[r]){ return false; } l += 1; r -= 1; } return true; } void main() { print(checkPalin("abqa")); } ``` ```go package main import "fmt" func isPalindrome(str string) bool { var reverse string for _, v := range str { reverse = string(v) + reverse } return str == reverse } func main() { var input string fmt.Print("Input String: ") fmt.Scan(&input) if (isPalindrome(input)) { fmt.Println("Palindrome String") } else { fmt.Println("Not Palindrome String") } } ``` ```php ; chomp($name); @arr=split(//,$name); $count=@arr; $num=0; for ($i=0;$i<$count;$i++){ if ($arr[$i] eq $arr[$count-1]){ $count--; }else{ $num++; last; } } if ($num == 0){ print "It is a palindrome"; }else{ print "It is not a palindrome"; } ``` ```python def checkPalindromeString(str): return str == str[::-1] print("Palindrome String" if checkPalindromeString("abba") else "Not Palindrome String") ``` ```r # Function to check if a string is a palindrome isPalindrome <- function(s) { s <- tolower(s) s <- gsub(" ", "", s) rev_s <- paste(rev(unlist(strsplit(s, ""))), collapse = "") return(s == rev_s) } #input user_input <- "racecar" # Check if the user input is a palindrome and print YES or NO if (isPalindrome(user_input)) { cat("Palindrome String\n") } else { cat("Not Palindrome String\n") } ``` ```rust fn check_palindrome_string(string: &str) { let reverse_string: String = string.chars().rev().collect(); if string == reverse_string { println!("Palindrome String"); } else { println!("Not Palindrome String"); } } fn main() { check_palindrome_string("abba"); } ```

Check Palindrome String

Write a program to check palindrome string

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