Palindrome Program using Golang

Introduction

A word or group of words that is the same when you read it forwards from the beginning or backwards from the end.

for e.g. Refer, Level, and etc.

In this article I will you how to check palindrome number and string.

Write checkStringPalindrome() function to check palindrome string

// checkStringPalindrome function Check whether a String is palindrome or not
func checkStringPalindrome(str string) bool {
    count := len(str)
    for i := 0; i < count/2; i++ {
        if str[i] != str[count-1-i] {
            return false
        }
    }

    return true
}

Write checkNumberPalindrome() function to check palindrome number

func checkNumberPalindrome(number uint64) bool {
    num := number
    var reverseNum uint64 = 0
    var a uint64
    for {
        a = num % 10
        reverseNum = reverseNum*10 + a
        num /= 10

        if num == 0 {
            break
        }
    }

    if number == reverseNum {
        return true
    } else {
        return false
    }

}

Create a function to remove non-alpha characters

// removeSpecialCharacters removes non-alphanumeric characters from a string
func removeSpecialCharacters(str string) string {
    return strings.Map(func(r rune) rune {
        if unicode.IsLetter(r) || unicode.IsDigit(r) || unicode.IsSpace(r) {
            return r
        }
        return -1
    }, str)
}

Write main() function

func main() {
    // Taking string input from user for palindrome check
    var str string
    reader := bufio.NewReader(os.Stdin)
    fmt.Println("Enter a string:")

    // Read the input until the newline character
    input, err := reader.ReadString('\n')
    if err != nil {
        fmt.Println("Error reading input:", err)
        return
    }

    // Trim the newline character from the end
    str = strings.TrimSpace(input)
    // Replace spaces with empty string
    str = strings.ReplaceAll(str, " ", "")
    // Convert to lower case
    str = strings.ToLower(str)
    // Remove special characters
    str = removeSpecialCharacters(str)

    if checkStringPalindrome(str) {
        fmt.Println(str, "is Palindrome")
    } else {
        fmt.Println(str, "is not Palindrome")
    }

    var number uint64
    fmt.Println("Enter a number(without space): ")
    _, err = fmt.Scanln(&number)
    if err != nil {
        log.Fatalf("Error reading input: %v\n", err)
        return
    }

    if checkNumberPalindrome(number) {
        fmt.Println(number, "is Palindrome")
    } else {
        fmt.Println(number, "is not Palindrome")
    }

}

Combined all together

package main

import (
    "bufio"
    "fmt"
    "log"
    "os"
    "strings"
    "unicode"
)

// Example 1: Golang Program code to Check whether a string is palindrome or not
func checkStringPalindrome(str string) bool {
    count := len(str)
    for i := 0; i < count/2; i++ {
        if str[i] != str[count-1-i] {
            return false
        }
    }

    return true
}

// Example 2: Golang Program Code to Check whether a Number is palindrome or not
func checkNumberPalindrome(number uint64) bool {
    num := number
    var reverseNum uint64 = 0
    var a uint64
    for {
        a = num % 10
        reverseNum = reverseNum*10 + a
        num /= 10

        if num == 0 {
            break
        }
    }

    if number == reverseNum {
        return true
    } else {
        return false
    }

}

// removeSpecialCharacters removes non-alphanumeric characters from a string
func removeSpecialCharacters(str string) string {
    return strings.Map(func(r rune) rune {
        if unicode.IsLetter(r) || unicode.IsDigit(r) || unicode.IsSpace(r) {
            return r
        }
        return -1
    }, str)
}

func main() {
    // Taking string input from user for palindrome check
    var str string
    reader := bufio.NewReader(os.Stdin)
    fmt.Println("Enter a string:")

    // Read the input until the newline character
    input, err := reader.ReadString('\n')
    if err != nil {
        fmt.Println("Error reading input:", err)
        return
    }

    // Trim the newline character from the end
    str = strings.TrimSpace(input)
    // Replace spaces with empty string
    str = strings.ReplaceAll(str, " ", "")
    // Convert to lower case
    str = strings.ToLower(str)
    // Remove special characters
    str = removeSpecialCharacters(str)

    if checkStringPalindrome(str) {
        fmt.Println(str, "is Palindrome")
    } else {
        fmt.Println(str, "is not Palindrome")
    }

    var number uint64
    fmt.Println("Enter a number(without space): ")
    _, err = fmt.Scanln(&number)
    if err != nil {
        log.Fatalf("Error reading input: %v\n", err)
        return
    }

    if checkNumberPalindrome(number) {
        fmt.Println(number, "is Palindrome")
    } else {
        fmt.Println(number, "is not Palindrome")
    }

}