String to Int in Kotlin

In Kotlin, you can use the toInt() function to convert a string to an integer.

Here's an example:

fun main() {
  val stringNumber = "42"
  val intNumber = stringNumber.toInt()
  println(intNumber) // prints 42
}

In this example, we have a string variable called stringNumber that contains the value "42". We then use the toInt() function to convert it to an integer and store the result in a variable called intNumber. Finally, we use println() to print the value of intNumber to the console.

An important thing to note is that if the string cannot be converted to an integer, a NumberFormatException will be thrown.

fun main() {
  val stringNumber = "not a number"
  val intNumber = stringNumber.toInt() // throws NumberFormatException
  println(intNumber)
}

In this example, the string "not a number" cannot be converted to an integer, and so toInt() throws a NumberFormatException.