Safe Calls and Elvis Operator
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fun main(args : Array<String>){
}
fun ifElseNull(){
//safe call operator ?.
val text: String? = null
val textLength = if (text != null) text.length else 7
println(textLength)
}
//elvis operator ?:
fun elvisOperator(){
val text: String? = "okkk"
val textLength = text?.length ?: 7
}
// non-null assertion
fun nonNullAssert(){
val text: String? = null
//null pointer exeption
val textLength = text!!.length
println(textLength)
}
Kotlin
INFO