While working on the Palindrome Problem on LeetCode, I discovered a method for converting integers to strings in Go. This method is part of the string conversion package strconv, and the specific function used is Itoa, which converts an integer to its ASCII string representation.

Converting Integers to Strings#

To convert an integer to a string in Go, you can use the strconv.Itoa function. Here is an example:

package main

import (
    "strconv"
    "fmt"
)

func main() {
    x := 123
    str := strconv.Itoa(x)
    fmt.Println("The string representation of the integer is:", str)
}

Example in a Palindrome Check#

In the context of checking if an integer is a palindrome, you can convert the integer to a string and then compare it to its reverse. Here’s how you can do that:

package main

import (
    "strconv"
    "fmt"
)

// Function to reverse a string
func reverseString(s string) string {
    runes := []rune(s)
    for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
        runes[i], runes[j] = runes[j], runes[i]
    }
    return string(runes)
}

// Function to check if an integer is a palindrome
func isPalindrome(x int) bool {
    // Convert integer to string
    a := strconv.Itoa(x)
    // Reverse the string
    b := reverseString(a)
    // Compare the original string with its reverse
    return a == b
}

func main() {
    fmt.Println(isPalindrome(121)) // Output: true
    fmt.Println(isPalindrome(-121)) // Output: false
    fmt.Println(isPalindrome(10))   // Output: false
}

Comparing Strings for Equality#

Another important aspect I encountered is that in Go, you can compare two strings for equality using the == operator. This is straightforward and works as expected:

package main

import (
    "strconv"
    "fmt"
)

func isPalindrome(x int) bool {
    a := strconv.Itoa(x)
    b := reverseString(a)
    return a == b
}

// Function to reverse a string
func reverseString(s string) string {
    runes := []rune(s)
    for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
        runes[i], runes[j] = runes[j], runes[i]
    }
    return string(runes)
}

func main() {
    fmt.Println(isPalindrome(121)) // Output: true
    fmt.Println(isPalindrome(-121)) // Output: false
    fmt.Println(isPalindrome(10))   // Output: false
}

Further Reading#

• Strings in Golang