How to check if a string is a palindrome in Golang?

To check if a string is a palindrome in Golang, you can follow these steps:

Import the strings package for manipulating strings:

import "strings"

Define a function that takes a string as input and returns a boolean value indicating whether it is a palindrome:

func isPalindrome(str string) bool {
   // Convert the string to lowercase and remove any non-alphanumeric characters
   str = strings.ToLower(str)
   str = removeNonAlphanumeric(str)

   // Check if the reversed string is equal to the original string
   return str == reverseString(str)
}

Define a helper function to reverse the input string:

func reverseString(str string) string {
   reversed := ""
   for i := len(str) - 1; i >= 0; i-- {
      reversed += string(str[i])
   }
   return reversed
}

Define a helper function to remove non-alphanumeric characters from the input string:

func removeNonAlphanumeric(str string) string {
   var sb strings.Builder
   for _, char := range str {
      if (char >= 'a' && char <= 'z') || (char >= '0' && char <= '9') {
         sb.WriteRune(char)
      }
   }
   return sb.String()
}

Test the function with different strings:

func main() {
   testString := "A man, a plan, a canal: Panama"
   if isPalindrome(testString) {
      fmt.Println("The string is a palindrome")
   } else {
      fmt.Println("The string is not a palindrome")
   }
}

In this example, the function will output "The string is a palindrome" because the test string "A man, a plan, a canal: Panama" is a palindrome. However, keep in mind that the solution may vary depending on how you define a palindrome (e.g., consider case sensitivity and whitespace handling).