Golang string to int

The built in 'strconv¹' package contains a function named 'Atoi²' (ASCII to integer). Which is just a wrapper for the 'ParseInt³' function.

Background

A string is an array of continuous single bytes, eight bits per character. So the word 'text' would read the following as an bytes array.

You can find the ASCII table here⁴, each byte value correspondents to a character.

Now let's say we have a string that contains the number 179355. It would take up 6 bytes, whilst it can easily be contained in a 4 byte, 32 bit integer.

The function

The builtin way is achieved by importing the package 'strconv'.

package main
import (
	"fmt"
	"strconv"
)
func main() {
	StringWithNumber := "179355"
	Integer, _ := strconv.Atoi(StringWithNumber)
	fmt.Println("Number as type integer: ", Integer)
}