「A Tour of Go」でGo言語を学ぶ(~#20) ref: http://qiita.com/items/63fad29ca7b75dc85ddd

file1.txt

45

file3.go

for sum < 1000{
}

file4.go

for {
}

if.go

package main

import "fmt"

func main() {
    sum := 0
    for i := 0; i < 10; i++ {
        sum += i
    }
    fmt.Println(sum)
}

if2.go

package main

import "fmt"

func main() {
    sum := 1
    for ; sum < 1000; {
        sum += sum
    }
    fmt.Println(sum)
}