Hello everyone, can someone tell me what's wrong why coroutines doesn't work?

# getting-started

[Ume Channel]

Hello everyone, can someone tell me what's wrong why coroutines doesn't work?

[Joffrey]

Did you add the coroutines library (kotlinx-coroutines-core) to your build script (build.gradle.kts)?

[Ume Channel]

where should I put?

[Joffrey]

You should add the coordinates of the coroutines library in the dependencies { ... } block. Something like:

dependencies {
    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3")
    testImplementation(kotlin("test"))
}

If you look it up, you will find the kotlinx.coroutines repository, and there are instructions on how to add the dependency:
https://github.com/Kotlin/kotlinx.coroutines#gradle

(This is the case for any well-documented library)

This is where you can find the coordinates in the form groupId:artifactId:version. For coroutines 1.7.3, the coordinates are org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3. This is why we add the line implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.3").

[Joffrey]

Most dependencies you will add will be with the implementation(...) configuration. testImplementation is for dependencies that are only used in your tests (this is why kotlin("test") is added with testImplementation(...)).

You can learn more about these configuration in the documentation of the Gradle build tool, which is what you're using here.
https://docs.gradle.org/current/userguide/declaring_dependencies.html

[Ume Channel]

Thank you for your help! Highly appreciated!💯