for loops in Odin

for is Odin's only loop, wearing three costumes: range, C-style, and for-in.

package main

import "core:fmt"

main :: proc() {
    // for is the only loop; ..< is a half-open range.
    for lap in 1..=4 {
        fmt.println("sled dog lap", lap)
    }

    // The C-style form still works when you need the knobs.
    for bell := 6; bell > 0; bell -= 2 {
        fmt.println("bells:", bell)
    }

    // Range over a value: element and index come out together.
    for temp, day in ([4]int{61, 68, 74, 79}) {
        fmt.printfln("day %d: %d F", day + 1, temp)
    }
}

How it works

1. for lap in 1..=4 walks an inclusive range; ..< would stop early.
2. The C-style init; cond; post form remains for counting down bells.
3. Ranging over an array yields element and index together.

Keywords and builtins used here

• for
• import
• in
• int
• package
• proc

The run, in numbers

Lines

20

Characters to type

432

Tokens

98

Three-star pace

70 tpm

At the three-star pace of 70 tokens a minute, this run takes about 84 seconds.

Type this snippet

Step 2 of 3 in Control flow, step 5 of 27 in Language basics.

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for loops in other languages

• Bash
• Delphi
• Scala
• Zig