Numeral systems - binary

package main

import "fmt"

func main() {
 fmt.Printf("%d - %b \n", 42, 42)
}

Output:

 42 - 101010 

Program exited.

Try it On Golang Play Ground - (https://play.golang.org/p/8oA-JOz0flp)
in above program the annotation verb %b formats a number in binary Ex:- which represent 101010 ( base 2 format) and the annotation verb %d formats a number in Base 10 Ex:which represent 42 ( base 10 format)

Integer cheatsheet for fmt

  %b	base 2
  %c	the character represented by the corresponding Unicode code point
  %d	base 10
  %o	base 8
  %q	a single-quoted character literal safely escaped with Go syntax.
  %x	base 16, with lower-case letters for a-f
  %X	base 16, with upper-case letters for A-F
  %U	Unicode format: U+1234; same as "U+%04