Reading input from Command Line

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The arguments passed from the console can be received in the Kotlin program and it can be used as an input. You can pass N (1 2 3 and so on) numbers of arguments from the command prompt.

A simple example of a command-line argument in Kotlin.

fun main(args: Array<String>) {

    println("Enter Two number")
    var (a, b) = readLine()!!.split(' ') // !! this operator use for NPE(NullPointerException).

    println("Max number is : ${maxNum(a.toInt(), b.toInt())}")
}

fun maxNum(a: Int, b: Int): Int {

    var max = if (a > b) {
        println("The value of a is $a");
        a
    } else {
        println("The value of b is $b")
        b
    }

    return max;

}

Here, Enter two number from the command line to find the maximum number. Output :

Enter Two number
71 89 // Enter two number from command line

The value of b is 89
Max number is: 89

For !! Operator Please check Null Safety.

Note: Above example compile and run on Intellij.

Found a mistake? Have a question or improvement idea? Let me know.

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