Swift packages and modules

A growing report tool needs more than one source file. A module is a unit of code imported by name. Swift Package Manager organizes targets, dependencies and build settings in a package manifest, allowing reusable library and executable components.

Create an executable package in a new empty directory with swift package init --type executable. Inspect Package.swift and the generated source layout, then use swift run. The generated paths can depend on the toolchain template, so inspect them instead of blindly overwriting a presumed file.

Save this complete program as main.swift and run it with the Swift toolchain. No separate input file is needed.

Swift · complete program

import Foundation
let labels = ["Diya", "Saira"]
print(labels.joined(separator: ", "))

Expected output

Diya, Saira

Follow the execution

This single-file example imports Foundation and uses a standard collection operation to form a report label. For a package exercise, place the relevant statements in the generated executable source and run the package. Importing a module differs from copying all its source into this file.

A library target can own calculation logic while an executable target owns input and display. Tests can then exercise the calculation without parsing console text. Expose only the API callers need, and keep file paths and environment-specific choices outside reusable arithmetic.

Your task: What is Package.swift responsible for?

Swift · complete program

import Foundation
let labels = ["Diya", "Saira"]
print(labels.joined(separator: ", "))

Worked answer

It declares package configuration such as products, targets and dependencies. It is not a student dataset or the executable’s ordinary report output.

Use swift build to build and swift test for configured tests. Third-party dependencies introduce version, licence and trust decisions. Importing a name alone does not download or configure an arbitrary package in the single-file online compiler.

It declares package configuration such as products, targets and dependencies. It is not a student dataset or the executable’s ordinary report output. Use swift build to build and swift test for configured tests.

Further reading: official Swift language guide.