sajjadyousefnia

fun surroundingFunction() {
    val intList = listOf(1, 2, 3, 4, 5)
    intList.forEach {
        if (it % 2 == 0) {
            return@forEach
        }
    }
    println("End of surroundingFunction()") // Now, it will execute
}
 

sajjadyousefnia

// ...
intList.forEach myLabel@ {
    if (it % 2 == 0) {
        return@myLabel
// ...

sajjadyousefnia

fun surroundingFunction() {
    val intList = listOf(1, 2, 3, 4, 5)
    intList.forEach {
        if (it % 2 == 0) {
            return@forEach
        }
    }
    println("End of surroundingFunction()") // Now, it will execute
}
 

sajjadyousefnia

// ...
intList.forEach myLabel@ {
    if (it % 2 == 0) {
        return@myLabel
// ...

sajjadyousefnia

class Circle {
 
    fun calculateArea(radius: Double): Double {
        require(radius > 0, { "Radius must be greater than 0" })
        return Math.PI * Math.pow(radius, 2.0)
    }
}

sajjadyousefnia

val circle = Circle()
print(circle.calculateArea(4.5)) // will print "63.61725123519331"

sajjadyousefnia

val stringList: List<String> = listOf("in", "the", "club")
print(stringList.last{ it.length == 3}) // will print "the"

sajjadyousefnia

val strLenThree = stringList.last( fun(string): Boolean {
    return string.length == 3
})
print(strLenThree) // will print "the"

sajjadyousefnia

fun surroundingFunction() {
    val intList = listOf(1, 2, 3, 4, 5)
    intList.forEach ( fun(number) {
        if (number % 2 == 0) {
            return
        }
    })
    println("End of surroundingFunction()") // statement executed
}
 

sajjadyousefnia

fun printCircumferenceAndArea(radius: Double): Unit {
 
    fun calCircumference(radius: Double): Double = (2 * Math.PI) * radius
    val circumference = "%.2f".format(calCircumference(radius))
 
    fun calArea(radius: Double): Double = (Math.PI) * Math.pow(radius, 2.0)
    val area = "%.2f".format(calArea(radius))
 
    print("The circle circumference of $radius radius is $circumference and area is $area")
}