Found 417 Articles for Kotlin

In this article, we will understand how to add two complex numbers in Kotlin. They have the ‘I’ that is, an imaginary part associated with it. Below is a demonstration of the same − Suppose our input is 15 +i24 and 3 +i7 The desired output would be 18 +i31 Algorithm Step 1 − Start Step 2 − Declare three Complex numbers: inputValue1, inputValue2 and myResult Step 3 − Hardcode the complex number values Step 4 − Define a function addComplexNumber, wherein you add the real numbers and the imaginary numbers separately and return the result. Step ... Read More

In this article, we will understand how to multiply two floating-point numbers. A floating-point number, is a positive or negative whole number with a decimal point. There are two types of floating point in Kotlin Float Double Below is a demonstration of the same − Suppose our input is val1: 10.5 val2: 45.0 The desired output would be The product is: 472.5 Algorithm Step 1 − Start Step 2 − Declare three floating points: val1, val2 and product Step 3 − Define the floating-point values Step 4 − Read the values Step 5 − Multiply ... Read More

In this article, we will understand how to read a number from standard input in Kotlin. The ‘nextInt’ method is used to read the number. Below is a demonstration of the same Suppose our input is 45 The desired output would be The input value is 45 Algorithm Step 1 − Start Step 2 − Declare an integer: value Step 3 − Define the integer Step 4 − Read the values Step 5 − Display the value Step 6 − Stop Example 1 In this example, we will read the number from the standard input using ... Read More

In this article, we will understand how to how to swap two numbers in Kotlin. This is done using a temporary variable. Below is a demonstration of the same Suppose our input is val1 : 45 val2 : 60 The desired output would be val1 : 60 val2 : 45 Algorithm Step 1 − Start Step 2 − Declare three integers: val1, val2 and tempVal Step 3 − Define the values Step 4 − Assign val1 to temporary variable Step 5 − Assign val2 to val1 Step 6 − Assign temporary tempVal variable to val2 Step 7 ... Read More

In this article, we will understand how to add two numbers. This can be done using the ‘+’ operator. Below is a demonstration of the same Suppose our input is input1 : 10 input2 : 15 The desired output would be Sum : 25 Algorithm Step 1 − Start Step 2 − Declare three integers: val1, val2 and sum Step 3 − Define the integers Step 4 − Add the two values using an addition operator (+) Step 5 − Display the result Step 6 − Stop Example 1 In this example, we will add two numbers ... Read More

In this article, we will understand how to print a string. String is a datatype that contains one or more characters and is enclosed in double quotes(“ ”). Below is a demonstration of the same Suppose our input is − Hello my name is John! The desired output would be The string is: Hello my name is John! Algorithm Step 1 − START Step 2 − Define a string variable Step 3 − Display the string on the console Step 4 − STOP Example 1 In this example, we will print a string using the print() ... Read More

In this article, we will understand how to print an integer. Integer is a primitive data type that contains numbers up to 32 bits. Below is a demonstration of the same − Suppose our input is − 45 The desired output would be − The integer is: 45 Algorithm Step 1 − START Step 2 − Define the integer value in a variable Step 3 − Display it on the console Step 4 − STOP Example 1 In this example, we will simply print an integer using the print() method. First, declare an integer variable, which ... Read More

In this article, we will understand how to print hello world in Kotlin. Hello world is stored as a string format and is printed using ‘print()’ function. Input Suppose our input is Hello World Output The expected out should be Hello World Algorithm Step 1 − START Step 2 − Define a string variable Step 3 − Display the string on the console Step 4 − STOP Example 1 In this example, we will simply display a string “Hello World” using the print() method in Kotlin − fun main() { val inputStr = ... Read More

In this article, we will see how to find the number of repeated values in a Kotlin list.Example – Finding Repeated Values Using groupingBy()The Kotlin library provides an inline function called groupingBy() which creates a grouping source from an array to be used later with one of the group-and-fold operations using the specified keySelector function to extract a key from each element.The function declaration of groupingBy() looks like this −inline fun Array.groupingBy(    crossinline keySelector: (T) -> K ): GroupingIn this example, we will create a list of values and implement groupingBy() in the list.fun main(args: Array) {   ... Read More

A Mutable List is an interface and generic collection of elements. Once a collection is declared as mutable, it becomes dynamic and we can modify its data as per requirement. A mutable list grows automatically in size as we insert new elements into it. The Mutable List inherits form the Generic class.Example – Creating a Mutable List in KotlinIn order to create a mutable list of repeating elements, we will be using Kotlin List(). By definition, it looks like this−inline fun List(    size: Int,    init: (index: Int) -> T ): ListAs we pass an initial default value, ... Read More