Course

Introduction

Print an Integer (Entered by the User)Add Two Integers Multiply two Floating Point Numbers Find ASCII value of a character Compute Quotient and Remainder Swap Two Numbers Check Whether a Number is Even or Odd Find the Frequency of Character in a String Remove All Whitespaces from a String Round a Number to n Decimal Places

Decision Making and Loop

Check Whether an Alphabet is Vowel or Consonant Find the Largest Among Three Numbers Find all Roots of a Quadratic Equation Check Leap Year Check Whether a Number is Positive or Negative Check Whether a Character is Alphabet or Not Calculate the Sum of Natural Numbers Find Factorial of a Number Generate Multiplication Table Display Fibonacci Series Find GCD of two Numbers Find LCM of two Numbers Display Characters from A to Z using loop Count Number of Digits in an Integer Reverse a Number Calculate the Power of a Number Check Whether a Number is Palindrome or Not Check Whether a Number is Prime or Not Display Prime Numbers Between Two Intervals Check Armstrong Number Display Armstrong Number Between Two Intervals Display Factors of a Number Make a Simple Calculator Using switch...case Count the Number of Vowels and Consonants in a Sentence Sort Elements in Lexicographical Order (Dictionary Order)Create Pyramid and Pattern

Functions

Display Prime Numbers Between Intervals Using Function Display Armstrong Numbers Between Intervals Using Function Check Whether a Number can be Expressed as Sum of Two Prime Numbers Find the Sum of Natural Numbers using Recursion Find Factorial of a Number Using Recursion Find G.C.D Using Recursion Convert Binary Number to Decimal and vice-versa Convert Octal Number to Decimal and vice-versa Convert Binary Number to Octal and vice-versa Reverse a Sentence Using Recursion calculate the power using recursion

Arrays

Calculate Average Using Arrays Find Largest Element in an Array Calculate Standard Deviation Add Two Matrix Using Multi-dimensional Arrays Multiply to Matrix Using Multi-dimensional Arrays Multiply two Matrices by Passing Matrix to a Function Find Transpose of a Matrix Print an Array Concatenate Two Arrays Convert Character to String and Vice-Versa Check if An Array Contains a Given Value

Collections

Join Two Lists Convert List (ArrayList) to Array and Vice-Versa Convert Map (HashMap) to List Convert Array to Set (HashSet) and Vice-Versa Sort a Map By Values

Object and Class

Add Two Complex Numbers by Passing Class to a Function Calculate Difference Between Two Time Periods

Advanced

Convert String to Date Get Current Date/TIme Convert Milliseconds to Minutes and Seconds Add Two Dates Get Current Working Directory Convert Byte Array to Hexadecimal Create String from Contents of a File Append Text to an Existing File Convert a Stack Trace to a String Convert File to byte array and Vice-Versa Convert InputStream to String Convert OutputStream to String Lookup enum by String value Compare Strings Sort ArrayList of Custom Objects By Property Check if a String is Numeric

Kotlin Program to Calculate Difference Between Two Time Periods

Example: Calculate Difference Between Two Time Periods


              
class Time(internal var hours: Int, internal var minutes: Int, internal var seconds: Int)

fun main(args: Array<String>) {
    val start = Time(12, 34, 55)
    val stop = Time(8, 12, 15)
    val diff: Time

    diff = difference(start, stop)

    print("TIME DIFFERENCE: ${start.hours}:${start.minutes}:${start.seconds} - ")
    print("${stop.hours}:${stop.minutes}:${stop.seconds} ")
    print("= ${diff.hours}:${diff.minutes}:${diff.seconds}")
}

fun difference(start: Time, stop: Time): Time {
    val diff = Time(0, 0, 0)

    if (stop.seconds > start.seconds) {
        --start.minutes
        start.seconds += 60
    }

    diff.seconds = start.seconds - stop.seconds
    if (stop.minutes > start.minutes) {
        --start.hours
        start.minutes += 60
    }

    diff.minutes = start.minutes - stop.minutes
    diff.hours = start.hours - stop.hours

    return diff
}

When you run the program, the output will be:


              
TIME DIFFERENCE: 12:34:55 - 8:12:15 = 4:22:40

In the above program, we’ve created a class named Time with three member variables: hours, minutes and seconds. As name suggests, they store hours, minutes and seconds of a given time respectively.

The Time class has a constructor that initializes the value of hours, minutes and seconds.

We’ve also created a static function difference that takes two Time variables as parameters, finds the difference and returns it as Time class.

Here’s the equivalent Java code: Java program to calculate difference between two time periods