Go Brain Teasers

Puzzle 1

A Number π

pi.go

package main

import (
        "fmt"
)

func main() {
        var π = 22 / 7.0
        fmt.Println(π)
}

Guess the Output
	Try to guess what the output is before moving to the next page.

This code will print: 3.1415929203539825

There are two surprising things here: one is that π is a valid identifier, and the second is that 355 / 113.0 actually compiles.

Let’s start with π. Go language specification on identifiers says