{"id":194330,"date":"2025-02-24T04:38:54","date_gmt":"2025-02-24T04:38:54","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=194330"},"modified":"2025-02-24T04:38:57","modified_gmt":"2025-02-24T04:38:57","slug":"palindromes-are-words-spelled-the-same-way-backwards-as-they-are-forwards-such-as-dad-or-mom","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/24\/palindromes-are-words-spelled-the-same-way-backwards-as-they-are-forwards-such-as-dad-or-mom\/","title":{"rendered":"Palindromes are words spelled the same way backwards as they are forwards such as dad or mom"},"content":{"rendered":"\n

Palindromes are words spelled the same way backwards as they are forwards such as dad or mom. Write a program that will accept input from the keyboard and then determine if the entered word is a palindrome. The program should continue as long as there is input OR as long as the user wishes to continue. (java)<\/p>\n\n\n\n

The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n

Here is a Java program that checks if a word is a palindrome and continues running until the user decides to exit.<\/p>\n\n\n\n

Java Program:<\/strong><\/h3>\n\n\n\n
import java.util.Scanner;\n\npublic class PalindromeChecker {\n    public static void main(String[] args) {\n        Scanner scanner = new Scanner(System.in);\n        String choice;\n\n        do {\n            System.out.print(\"Enter a word to check if it is a palindrome: \");\n            String word = scanner.nextLine().toLowerCase(); \/\/ Convert to lowercase to ignore case sensitivity\n\n            if (isPalindrome(word)) {\n                System.out.println(word + \" is a palindrome.\");\n            } else {\n                System.out.println(word + \" is not a palindrome.\");\n            }\n\n            System.out.print(\"Do you want to check another word? (yes\/no): \");\n            choice = scanner.nextLine().toLowerCase();\n\n        } while (choice.equals(\"yes\"));\n\n        System.out.println(\"Program terminated.\");\n        scanner.close();\n    }\n\n    public static boolean isPalindrome(String word) {\n        int left = 0;\n        int right = word.length() - 1;\n\n        while (left < right) {\n            if (word.charAt(left) != word.charAt(right)) {\n                return false;\n            }\n            left++;\n            right--;\n        }\n        return true;\n    }\n}<\/code><\/pre>\n\n\n\n
\n\n\n\n
Explanation:<\/strong><\/h3>\n\n\n\n
    \n
  1. Taking Input:<\/strong>
    The program uses a Scanner<\/code> object to accept user input. The word entered is converted to lowercase to ensure case insensitivity.<\/li>\n\n\n\n
  2. Checking for a Palindrome:<\/strong>
    The isPalindrome<\/code> method uses two pointers (left<\/code> and right<\/code>) to compare characters from both ends of the word. If all corresponding characters match, the word is a palindrome; otherwise, it isn\u2019t.<\/li>\n\n\n\n
  3. Loop for Continuous Execution:<\/strong>
    A do-while<\/code> loop ensures the program keeps running until the user enters “no.”<\/li>\n\n\n\n
  4. Time Complexity:<\/strong><\/li>\n<\/ol>\n\n\n\n
      \n
    • Checking if a word is a palindrome runs in O(n)<\/strong> time complexity since it scans half the word.<\/li>\n\n\n\n
    • Space complexity is O(1)<\/strong> since only a few extra variables are used.<\/li>\n<\/ul>\n\n\n\n
      This program effectively allows continuous checking of palindromes, giving the user control over termination.<\/p>\n\n\n\n
      \n\n\n\n
      Generated Image:<\/strong><\/h3>\n\n\n\n
      I will now generate an image representing the concept of a palindrome.<\/p>\n\n\n\n
      Here is the generated image illustrating the concept of a palindrome with a mirrored effect. Let me know if you need any modifications or further explanations!<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"
      Palindromes are words spelled the same way backwards as they are forwards such as dad or mom. Write a program that will accept input from the keyboard and then determine if the entered word is a palindrome. The program should continue as long as there is input OR as long as the user wishes to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-194330","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/194330","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=194330"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/194330\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=194330"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=194330"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=194330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}