Description

A string is called palindrome if reverse of the string is same as string. 
To check string is palindrome traverse string from beginning and compare
character of string from ith position to corresponding (length-i-1)th position.
if characters are same then string will be palindrome.

C/C++

/* C Program to check Palindrome */
//Save it as PalindromeString.c

#include<stdio.h>
int main(){

    char str[100];

    int i, length, flag=0;

    printf("Enter a string : ");
    gets(str);

    length = strlen(str);

    for(i=0;i<length;i++){
        if(str[i] != str[length-i-1]){
            flag = 1;
            break;
        }
    }

    if(flag==1){
        printf("%s is not palindrome",str);
    }else{
        printf("%s is palindrome",str);
    }

    return 0;
}

Input:
Enter a string : madam

Output:
madam is palindrome

Java

/* Java Program to check Palindrome */
//Save it as PalindromeString.java

import java.io.*;
import java.util.Scanner;

public class PalindromeString {

    public static void main(String[] args) {
        
            Scanner scanner = new Scanner(System.in);

            String str;

        int i, length, flag=0;

        System.out.println("Enter a string : ");
        str = scanner.nextLine();

        length = str.length();

        for(i=0;i<length;i++){
            if(str.charAt(i) != str.charAt(length-i-1)){
                flag = 1;
                break;
            }
        }

        if(flag==1){
            System.out.println(str + " is not palindrome");
        }else{
            System.out.println(str+" is palindrome");
        }
    }
}

Input:
Enter a string : 
madam

Output:
madam is palindrome

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