In this Kotlin Tutorial, we learned how to read an integer from console input using readLine() function and String.toInt() method. When we entered an invalid value for an integer, parsing failed and NumberFormatException is thrown. We then print the entered value back to console.Įxception in thread 'main' : For input string: 'asdf'Īt java.base/(NumberFormatException.java:65)Īt java.base/(Integer.java:652)Īt java.base/(Integer.java:770) In the following program, we read an integer number to n from user input.

Please note that we have used safe call ?. Once we got the string value, we convert it to an integer value using String.toInt() method, as shown in the following.

/// Create an RDS DB instance with a particular set of properties.

Please note that the function can also return a null value. Find the complete example and learn how to set up and run in the AWS Code Examples Repository. Call split () function on the string, and pass the regular expression that matches any whitespace character 's'.toRegex (), as argument to the function. To split a string by any whitespace character as separator in Kotlin, you can use String.split () function with regular expression. The syntax to call readLine() function is readLine() Kotlin Split string by any whitespace character.

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