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Hackerrank

A collection of 419 issues

Hackerrank Functions Solution

.MathJax_SVG_LineBox {display: table!important} .MathJax_SVG_LineBox span {display: table-cell!important; width: 10000em!important; min-width: 0; max-width: none; padding: 0; border: 0; margin: 0} Functions are a bunch of statements glued together. A function is provided with zero or more arguments, and it executes the statements on it.

Hackerrank For Loop Solution

A for loop is a programming language statement which allows code to be repeatedly executed. The syntax for this is for ( <expression_1> ; <expression_2> ; <expression_3> ) <statement> * expression_1 is used for intializing variables which are generally used for controlling terminating

Hackerrank Conditional Statements Solution

.MathJax_SVG_LineBox {display: table!important} .MathJax_SVG_LineBox span {display: table-cell!important; width: 10000em!important; min-width: 0; max-width: none; padding: 0; border: 0; margin: 0} if and else are two of the most frequently used conditionals in C/C++, and they enable you to execute zero or one conditional

Hackerrank Basic Data Types Solution

Some C++ data types, their format specifiers, and their most common bit widths are as follows: * Int ("%d"): 32 Bit integer * Long ("%ld"): 64 bit integer * Char ("%c"): Character type * Float ("%f"): 32 bit real value * Double ("%lf"): 64 bit

Hackerrank Input and Output Solution

Objective In this challenge, we're practicing reading input from stdin and printing output to stdout. In C++, you can read a single whitespace-separated token of input using cin, and print output to stdout using cout. For example, let's say we declare the following variables:string s;

Hackerrank Covariant Return Types Solution

Java allows for Covariant Return Types, which means you can vary your return type as long you are returning a subclass of your specified return type. Method Overriding allows a subclass to override the behavior of an existing superclass method and specify a return type that is some subclass of

Hackerrank Java Singleton Pattern Solution

"The singleton pattern is a design pattern that restricts the instantiation of a class to one object. This is useful when exactly one object is needed to coordinate actions across the system." - Wikipedia: Singleton Pattern Complete the Singleton class in your editor which contains the following components:

Hackerrank Java Factory Pattern Solution

According to Wikipedia, a factory is simply an object that returns another object from some other method call, which is assumed to be "new". In this problem, you are given an interface Food. There are two classes Pizza and Cake which implement the Food interface, and they both

Hackerrank Java Exception Handling Solution

You are required to compute the power of a number by implementing a calculator. Create a class MyCalculator which consists of a single method long power(int, int). This method takes two integers, and , as parameters and finds . If either or is negative, then the method must throw an exception

Hackerrank Java Exception Handling (Try-catch) Solution

Exception handling is the process of responding to the occurrence, during computation, of exceptions – anomalous or exceptional conditions requiring special processing – often changing the normal flow of program execution. (Wikipedia) Java has built-in mechanism to handle exceptions. Using the try statement we can test a block of code for errors.