For Loops

In Go, there is only one loop command, which is for. There are no while or do-while loops like other languages, but we can modify for to behave the same way.

When to use?

Use a Loop when you need to run the same block of code repeatedly, for example:

Printing numbers 1 to 100.

Reading data from a database row by row.

Processing each item in a shopping list.

MAIN.GO

package main
import "fmt"
func main() {
    // 1. Standard Loop (Init; Condition; Post)
    // Most common for fixed counts.
    for i := 0; i < 5; i++ {
        fmt.Println("Number:", i)
    }
    // 2. While-style Loop (Condition only)
    // Used if the number of iterations is uncertain, depending on a condition.
    j := 0
    for j < 3 {
        fmt.Println("While style:", j)
        j++ // Manual increment to avoid infinite loop
    }
}