Go - Palindrome Program Example

If a number/string, which when read in both forward and backward way is the same, then such a number is called a palindrome number.

Example 1. Go Program to check whether the given number is Palindrome or not

//Check Whether a Number is Palindrome or Not
package main
import "fmt"
// Main function
func main() {
    number1 := 121
    number2 := 125
    number3 := 125521
    IsPalindrome(number1)
    IsPalindrome(number2)
    IsPalindrome(number3)
}
func IsPalindrome(number int) {
    var lastDigit int
    sum := 0
    a := number
    // Code to reverse a number
    for a != 0 {
        lastDigit = a % 10 //getting remainder
        sum = (sum * 10) + lastDigit
        a = a / 10
    }
    /*If given number equal to sum than number
      is palindrome otherwise not palindrome*/
    if sum == number {
        fmt.Println(number, " is palindrome ")
    } else {
        fmt.Println(number, " is not palindrome")
    }
}

Output:

Example 2. Go Program to check whether the given String is Palindrome or not

//Check Whether a String is Palindrome or Not
package main
import "fmt"
// Main function
func main() {
    str1 := "hello"
    str2 := "iTopiNonAvevAnoNipoTi"
    str3 := "121"
    IsPalindrome(str1)
    IsPalindrome(str2)
    IsPalindrome(str3)
}
func IsPalindrome(str string) {
    var reverse string
    // Code to reverse a string
    for i := len(str) - 1; i >= 0; i-- {
        reverse = reverse + string(str[i])
    }
    if str == reverse {
        fmt.Println(str, " is palindrome ")
    } else {
        fmt.Println(str, " is not palindrome")
    }
}

Output:

Example 3. Go Program to check whether the input number is Palindrome or not

//Check Whether a Number is Palindrome or Not
package main
import "fmt"
// Main function
func main() {
    var number int
    fmt.Println("Enter the number : ")
    _, err := fmt.Scanf("%d", &number)
    if err != nil {
        fmt.Println(err)
    }
    IsPalindrome(number)
}
func IsPalindrome(number int) {
    var lastDigit int
    sum := 0
    a := number
    // Code to reverse a number
    for a != 0 {
        lastDigit = a % 10 //getting remainder
        sum = (sum * 10) + lastDigit
        a = a / 10
    }
    /*If given number equal to sum than number
      is palindrome otherwise not palindrome*/
    if sum == number {
        fmt.Println(number, " is palindrome ")
    } else {
        fmt.Println(number, " is not palindrome")
    }
}

Output:

Example 4. Go Program to check whether the input String is Palindrome or not

//Check Whether a String is Palindrome or Not
package main
import "fmt"
// Main function
func main() {
    var str string
    fmt.Println("Enter the string : ")
    fmt.Scanln(&str)
    IsPalindrome(str)
}
func IsPalindrome(str string) {
    var reverse string
    // Code to reverse a string
    for i := len(str) - 1; i >= 0; i-- {
        reverse = reverse + string(str[i])
    }
    if str == reverse {
        fmt.Println(str, " is palindrome ")
    } else {
        fmt.Println(str, " is not palindrome")
    }
}

Output: