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Kotlin program to check for Empty, Blank or NULL string

Kotlin | Check for empty string: Here, we are going to learn how to check whether a given string is an empty, blank or NULL string in Kotlin programming language?
Submitted by IncludeHelp, on April 27, 2020

Given a string, we have to check whether it is an empty, blank or NULL string.

Example:

    Input:
    str = ""

    Output:
    True

Program to check for Empty, Blank or NULL string in Kotlin

package com.includehelp.basic

//Main Function, entry Point of Program
fun main(args: Array<String>) {
    ///Nullable String
    val s1: String?=null

    //Empty String
    val s2: String=""

    //Blank String, Contained only white spaces
    val s3="         "

    println("String s1 is  isNullOrEmpty :  ${s1.isNullOrEmpty()}")
    println("String s2 is  isEmpty       :  ${s2.isEmpty()}")
    println("String s3 is  isBlank       :  ${s3.isBlank()}")
}

Output

String s1 is  isNullOrEmpty :  true
String s2 is  isEmpty       :  true
String s3 is  isBlank       :  true