Note that we are escaping the in property with backticks because it’s a keyword in Kotlin.Ģ.2. Using the Scanner Class: Using the Scanner class is very straightforward we only need to create an instance and use the nextLine method: val scanner = Scanner(System.`in`) Thus, we can use the standard I/O classes from the JDK in our programs in case we need them.Ģ.1.

Using the Java Standard Library: Kotlin has great interoperability with Java. In order to read from the console, we can use readLine function: val inputText = readLine()Ģ. Also, the library offers us the println alternative function, witch adds the line separator at the end of the message. We’ll see the following message displayed on our terminal: Hello from Kotlinīehind-the-scenes this function uses the Java method. If we run the following snippet: print('Hello from Kotlin') To print in the console we can use the print function. Using the Kotlin Standard Library: The Kotlin standard library provides us extensions to handling I/O based on the classes of the JDK. There are multiple alternatives to handle Console I/O with Kotlin.ġ. Wrapping lines can be quickly commented out when happens a need to switch back to console.

Here are A+B examples in Kotlin reading from stdin: fun main() Note that since Kotlin 1.6 readLine()!! should be replaced with

Kotlin in