Function Initialize in runtime in Kotlin

In Kotlin, a function can be initialized dynamically at runtime using the :: operator, which is used to reference a member or a top-level function. Here's an example of dynamically initializing a function at runtime:

fun main() {
    // dynamically initializing a function at runtime
    val functionReference = ::addNumbers
    
    // calling the initialized function with arguments
    val result = functionReference.invoke(5, 10)
    
    println("The result is: $result")
}
fun addNumbers(num1: Int, num2: Int): Int {

    return num1 + num2

}

In this example, the function addNumbers is dynamically initialized using the :: operator and stored in a variable called functionReference. We then call the initialized function using the invoke method and pass it two arguments.

The output of the above code will be:

The result is: 15

We can also use lambda expressions to initialize functions dynamically at runtime. Here's an example:

fun main() {
    // dynamically initializing a function using lambda
    val functionReference = { num1: Int, num2: Int -> num1 * num2 }
    
    // calling the initialized function with arguments
    val result = functionReference.invoke(5, 10)
    
    println("The result is: $result")
}

In this example, we use a lambda expression to create a function that multiplies two numbers. The function is then dynamically initialized and stored in the functionReference variable. We then call the function using the invoke method and pass it two arguments.

The output of the above code will be:

The result is: 50