Kotlin Null Check

The standard method of checking reference of null is by utilizing the if-else expression. We can explicitly check the null variable, also manage the two options independently.

Program for checking null conditions:

fun main(args: Array<String>) { 

    var m: String? = "mindmajix"

    println(s) 

    if (m != null) { 

        println("length of the string ${m.length}") 

    } else { 

        println("it is a null string") 

    } 

    m = null

    println(m) 

    if (m != null) { 

        println("length of the string ${m.length}") 

    } else { 

        println("it is a null string") 

    } 

}