How to Use the strconv.AppendUint() Function in Golang

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Golang strconv.AppendUint() function is “used to append the string form of the unsigned integer i, as generated by FormatUint, to dst and returns the extended buffer”.

Syntax

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

Parameters

  1. dst: A byte array (or byte slices) in which we must append the string form of the unsigned integer.
  2. i: An integer value to be appended.
  3. base: Base of the integer value.

Return Value

The return type of the AppendUint() function is a []byte, and it returns the extended buffer after appending the string form of the unsigned integer.

Example 1: How to Use strconv.AppendUint() Function

package main

import (
  "fmt"
  "strconv"
)

func main() {
  // A slice of bytes
  s := []byte("uint number: ")

  // An unsigned integer
  num := uint64(12345)

  // Convert and append the number to the byte slice
  s = strconv.AppendUint(s, num, 10)

  // Convert the byte slice back to a string and print it
  fmt.Println(string(s))
}

Output

uint number: 12345

Example 2: Illustrate strconv.AppendUint() function

package main

import (
  "fmt"
  "strconv"
)

func main() {
  val1 := []byte("uint value (base 8): ")
  val1 = strconv.AppendUint(val1, 123, 8)
  fmt.Println(string(val1))
  fmt.Println("Length: ", len(val1))
  fmt.Println("Capacity: ", cap(val1))

  val2 := []byte("uint value (base 2): ")
  val2 = strconv.AppendUint(val2, 78, 2)
  fmt.Println(string(val2))
  fmt.Println("Length: ", len(val2))
  fmt.Println("Capacity: ", cap(val2))
}

Output

uint value (base 8): 173
Length: 24
Capacity: 48
uint value (base 2): 1001110
Length: 28
Capacity: 48

That’s it.

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strconv.AppendInt() Function in Go

strconv.AppendBool() Function in Go

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