How to use the strconv.AppendUint() function in Golang

Overview

The strconv package’s AppendUint() function appends the string form of the unsigned integer i (as generated by FormatUint() function) to dst. It returns the extended buffer.

Syntax

func AppendUint(dst []byte, i uint64, base int) []byte

Parameters

The AppendUint() function takes three parameters:

  • dst: This is a byte array to append the string form of the unsigned integer.
  • i: This is the integer value to be appended.
  • base: This is the base of the given integer value.

Return value

The function AppendUint() returns the extended buffer after the string form of the unsigned integer i is appended.

Example

The following code shows how to implement strconv.AppendUint() in Golang:

// Using the strconv.AppendUint() function 
package main
import (
	"fmt"
	"strconv"
)
func main() {
  // Declaring and assigning a value
	x := []byte("sample code")
	fmt.Println("The initial value before AppendUint(): ", string(x))
	// Appending the integer value in base 10
	x = strconv.AppendUint(x, 148, 10)
	fmt.Println()
	fmt.Println("The new value after AppendUint(): ",string(x))
	fmt.Println()
	
	// Appending the integer value in base 2
	x = strconv.AppendUint(x, 105, 2)
	fmt.Println()
	fmt.Println("The new values in the array: ",string( x))
}

Explanation

  • Line 4: We add the main package.
  • Lines 6–9: We import the necessary packages.
  • Line 11–31: We define the main() function and variables x and y of the byte array type. We then assign it an integer value and a base. Then, we pass the variable to the AppendUint() function, which appends the string form of the specified unsigned integer value. Finally, the result is displayed.

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