Packages

In Run, packages are a way to organize your code into logical groups.

Package main

Programs start their execution in package main.

By convention, the package name is the same as the last element of the import path. For instance, the “math/rand” package comprises files that begin with the statement package rand.

package main

use "fmt"
use "math/rand"

pub fun main() {
    fmt.println("A random number:", rand.intn(100))
}

Each source file belongs to exactly one package. A directory of .run files forms a package — all files in the same directory share the same package name.