reverse a string in golang

Here is a solution to reverse a string in Go, along with explanations for each step:

package main

import (
    "fmt"
)

func main() {
    str := "Hello, World!" // The string to be reversed
    reversedStr := reverseString(str) // Calling the reverseString function
    fmt.Println(reversedStr) // Printing the reversed string
}

// Function to reverse a string
func reverseString(s string) string {
    // Converting the string into a slice of runes
    runes := []rune(s)
    // Initializing two pointers, one at the start and the other at the end of the slice
    i, j := 0, len(runes)-1
    // Swapping the characters using the two pointers until they meet in the middle
    for i < j {
        runes[i], runes[j] = runes[j], runes[i]
        i++
        j--
    }
    // Converting the slice of runes back into a string and returning it
    return string(runes)
}

Explanation: 1. The reverseString function takes a string s as input and returns the reversed string. 2. Inside the function, the string s is converted into a slice of runes using []rune(s). This is necessary because Go strings are immutable, but slices are mutable. 3. Two pointers, i and j, are initialized at the start and end of the slice respectively. 4. A for loop is used to swap the characters at i and j until they meet in the middle. This is done by using the syntax runes[i], runes[j] = runes[j], runes[i]. 5. Finally, the reversed slice of runes is converted back into a string using string(runes) and returned from the function. 6. In the main function, a string str is assigned the value "Hello, World!". 7. The reverseString function is called with str as the argument, and the returned value is assigned to reversedStr. 8. The reversed string is printed to the console using fmt.Println(reversedStr).

I hope this explanation helps!