While Loop and Its Usage in Kotlin

Definition

• A while loop is a control flow statement that allows a particular code block to be executed repeatedly based on a given condition which returns a boolean value.
• The corresponding block of code is executed continuously until the condition fails.
• The while loop can be imagined of as a repeating if statement.

Syntax

while ( condition ) {
     Code to execute while the condition is true
}

While Loop Example Program in Kotlin

// While Loop in Kotlin Example Program
// Loop and Control Statements Kotlin Programs, Basic Kotlin Programs

fun main(args: Array<String>) {

    var num1 = 0
    
    while (num1<5) {
       println(" Value : $num1")
       num1++;
    }
    
}

Sample Output

 Value : 0
 Value : 1
 Value : 2
 Value : 3
 Value : 4

How It Works

This Kotlin program demonstrates While Loop and Its Usage. 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.