Read Data Input from Command Line in Kotlin

Definition

• While compiling and running a Kotlin Program through the command line, the user input can be passed along with the command to run the program.
• The arguments passed are separated by spaces( ).

Compiling the Kotlin Program

kotlinc ProgramName.kt

Running the Kotlin Program

kotlin ProgramNameKt Hey Kotlin Programmer

Here “Hey Kotlin Programmer” is the argument passed. Here, “Hey”, “Kotlin” and “Programmer” are separate arguments.

Read Input from Command Line in Kotlin Example Program

// Read Input from Command Line in Kotlin Example Program
// Data Input Kotlin Programs, Basic Kotlin Programs

fun main(args: Array<String>) {
    println("Printing all command line arguments: ")

	//Printing all arguments passed through command line
    for (item in args){
        println("Input argument : $item")
    }
}

Sample Output

Printing all command line arguments :
Input argument : Hey
Input argument : Kotlin
Input argument : Programmer

How It Works

This Kotlin program demonstrates Read Data Input from Command Line. It first prepares the data it needs, then walks through the data with a loop to compute the result, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Iterate over the data using a loop to apply the logic.
3. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.