For Loop

Go’da bitta yagona loop bor — for. Boshqa tillardagi while va do-while ni ham Go’da shu bitta for bilan yozamiz.

1. Shartli loop (while kabi)


i := 1
for i <= 3 {
    fmt.Println(i)
    i = i + 1
}

Shart true bo’lib turgan ekan, loop davom etaveradi — xuddi while singari.

2. Standart for loop


for j := 0; j < 3; j++ {
    fmt.Println(j)
}

Uch qismdan iborat: boshlang’ich qiymat; shart; har iteratsiya oxirida bajariladigan qadam.

3. Range bilan


for i := range 3 {
    fmt.Println("range", i)
}

0 dan 3 gacha aylanadi — 3 ning o’zi kirmaydi, ya’ni jami uch marta.

4. Cheksiz loop


for {
    fmt.Println("loop")
    break  // break to'xtatish uchun
}

Shartsiz for — to’xtovsiz aylanaveradi. Uni break yoki return bilan to’xtatamiz.

5. Continue


for n := range 6 {
    if n%2 == 0 {
        continue  // juft sonlarni o'tkazib yuborish
    }
    fmt.Println(n)
}

continue joriy iteratsiyani tashlab, to’g’ri keyingisiga o’tadi.

To’liq misol

for.go


package main
 
import "fmt"
 
func main() {
    i := 1
    for i <= 3 {
        fmt.Println(i)
        i = i + 1
    }
 
    for j := 0; j < 3; j++ {
        fmt.Println(j)
    }
 
    for i := range 3 {
        fmt.Println("range", i)
    }
 
    for {
        fmt.Println("loop")
        break
    }
 
    for n := range 6 {
        if n%2 == 0 {
            continue
        }
        fmt.Println(n)
    }
}

Natija:


$ go run for.go
1
2
3
0
1
2
range 0
range 1
range 2
loop
1
3
5