for

sum := 0
for i := 1; i <= 100; i++ {
    sum += i
}

package main

import (
    "fmt"
    "math/rand"
    "time"
)

func main() {
    var num int64
    rand.Seed(time.Now().Unix())
    for num != 5 {
        num = rand.Int63n(15)
        fmt.Println(num)
    }
}

import (
    "fmt"
    "math/rand"
    "time"
)

func main() {
    var num int32
    sec := time.Now().Unix()
    rand.Seed(sec)

    for {
        fmt.Print("Writing inside the loop...")
        if num = rand.Int31n(10); num == 5 {
            fmt.Println("finish!")
            break
        }
        fmt.Println(num)
    }
}

func main() {
    sum := 0
    for num := 1; num <= 100; num++ {
        if num%5 == 0 {
            continue
        }
        sum += num
    }
    fmt.Println("The sum of 1 to 100, but excluding numbers divisible by 5, is", sum)
}