Chapter 6. Files and I/O

Kotlin Chapter 6.
Files and I/O

Checking if a directory exists

Kotlin, running on the JVM, leverages the Java File API for file operations, making directory existence checks straightforward.

Creating a temporary file

Here’s a quick way to make a temp file in Kotlin.

Reading a text file

In Kotlin, you can read a text file easily using the readLines() function or the useLines block.

Reading command line arguments

In the code above, args is an array holding the command line arguments.

Writing a text file

Kotlin provides a straightforward approach for writing to files, leveraging the standard library without needing additional third-party libraries.

Writing to standard error

In Kotlin, writing to stderr can be achieved using System.err.println().