strconv.AppendQuoteRuneToASCII() Function in Golang With Examples

Go language provides inbuilt support to implement conversions to and from string representations of basic data types by strconv Package. This package provides an

AppendQuoteRuneToASCII() function

which is used to append a single-quoted Go character literal representing the rune x, as generated by QuoteRuneToASCII, to num and returns the extended buffer. Or in other words, AppendQuoteRuneToASCII() function is used to convert Unicode characters to ASCII strings resulting from “single quotes”, append the result to the end of num and return the appended []byte. To access AppendQuoteRuneToASCII() function you need to import strconv Package in your program.

Syntax:

func AppendQuoteRuneToASCII(num []byte, x rune) []byte

Here, num is []bytes and x is a rune literal. The result of x will append to the end of num.

Example 1:

// Golang program to illustrate the 
// strconv.AppendQuoteRuneToASCII() function
package main

import (
    "fmt"
    "strconv"
)

func main() {

         // Converting Unicode characters to 
         // ASCII strings resulting from "single quotes"
         // append the result to the end of the given []byte
         // Using AppendQuoteRuneToASCII() function
         val1 := []byte("Rune 1: ")
         val1 = strconv.AppendQuoteRuneToASCII(val1, 'B')
         fmt.Println(string(val1))

         val2 := []byte("Rune 2: ")
         val2 = strconv.AppendQuoteRuneToASCII(val2, '✈')
         fmt.Println(string(val2))

}

Output:

Rune 1: 'B'
Rune 2: '\u2708'

Example 2:

// Golang program to illustrate the 
// strconv.AppendQuoteRuneToASCII() function
package main

import (
    "fmt"
    "strconv"
)

func main() {

    // Converting Unicode characters to ASCII
    // strings resulting from "single quotes"
    // append the result to the end of the given []byte
    // Using AppendQuoteRuneToASCII() function
    val1 := []byte("Rune 1: ")
    val1 = strconv.AppendQuoteRuneToASCII(val1, 'c')
    fmt.Println(string(val1))
    fmt.Println("Length: ", len(val1))
    fmt.Println("Capacity: ", cap(val1))

    val2 := []byte("Rune 2: ")
    val2 = strconv.AppendQuoteRuneToASCII(val2, '❄')
    fmt.Println(string(val2))
    fmt.Println("Length: ", len(val2))
    fmt.Println("Capacity: ", cap(val2))
    

}

Output:

Rune 1: 'c'
Length:  11
Capacity:  16
Rune 2: '\u265b'
Length:  16
Capacity:  16