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In this article, we will learn how to convert a JSON object into XML format in Java. But first, let’s understand what JSON and XML are. JSON is a lightweight data-interchange format, and the format of JSON is like a key-value pair. XML (Extensible Markup Language) is also a way to store data, but unlike JSON, it uses tags to make the proper structure. Why Do we Convert JSON to XML? There can be multiple situations where we would need to convert JSON to XML. Here are some of the reasons: XML is ... Read More
The Fibonacci sequence is a sequence of numbers in which each number is the sum of the two numbers that precede it. ExampleBelow is the mathematical example to understand the logic of the Fibonacci number: Suppose, n = 3, then, F(0) = 0 F(1) = 1 F(2) = F(1) + F(0) = 1 + 0 = 1 F(3) = F(2) + F(1) = 1 + 1 = 2 .... .... So, Fibonacci numbers from F(0) to F(3): 0, 1, 1, 2.In this article, we will learn how to implement a C++ program to generate a Fibonacci series using recursion. ... Read More
The main() function is the entry point of every C++ program where execution begins. It is invoked automatically when the program is executed. The main() function returns the execution status to the operating system (indicating whether the program executed successfully or not). You can also use optional command-line arguments, argc and argv, to pass values to the program. Declaration /Prototype of main() The standard prototype of main() function is as follows: int main() { body } Or, int main(int argc, char *argv[]) { body } Here, argc : Number of arguments passed to the program from the environment ... Read More
In the OOPs concept of C++, the parent class represents the root of the hierarchy while the derived class is inherited from the parent class. The derived class is presented using the scope resolution operator (::). The derived class is also known as the child class or subclass. What is Parent Class? The parent class is also called a base class used to design the structure of variable and function initialization based on access specifiers (private, public, and protected). Syntax Following is the syntax of parent class in C++: class ParentClass { // Access specifiers: ... Read More
In C++, arranging the elements in increasing or decreasing order is called as Sorting. we usually use the sort() function from the STL (Standard Template Library). A sorted array is an array whose each of the elements are sorted in some order such as numerical, alphabetical etc. There are many algorithms to sort a numerical array like bubble sort, insertion sort, selection sort, merge sort, quick sort, heap sort, etc. The selection sort is a sorting method that yields a sorted array. It does so by repeatedly finding the smallest element in the array and interchanging it with the element ... Read More
In C++, the strand sort is a recursive sorting algorithm. It is used to extract increasing subsequences repeatedly (called strands) from the input list and merge them into a sorted list. There are multiple libraries that can be used for different purposes. This sorting is one of them. This sorting technique is particularly good for sorting linked lists, but can be used with arrays too. The following is a list of approaches for strand sorting in C++: These approaches is to extract sorted strands (in increasing/descending order) from the unsorted list and merge them one by one into a final ... Read More
You can print the numbers from 1 to 100 without a loop by using the various methods like recursive function and goto statement that print the list of integers.The following are the approaches to print the numbers from 1 to 100: Using Recursion As we know, recursion is the process of calling the function itself. Here, we use the recursive function to accept an integer and set the iteration of plus 1 without the logic of loop and get the expected outcome. Example In this example, we use an if statement to check whether the given integer is less than ... Read More
A factorial of a number defines the non-negative integer say n that calculate the product of a number by every positive integer until it reaches 1. The symbol of factorial is (!). Mathematically, it is represented by: n! = n x (n-1) x (n-2) x ... x 1 For eg. factorial of an integer 30! = 265252859812191058636308480000000. 30! = 30x29x28x27x26x25x24x23x22x21x20x19x18x17x16x15x14x13x12x11x10x9x8x7x6x5x4x3x2x1 A non-negative integer is defined by any whole number that is 0 or positive (not a fraction or decimal). What is Large Number? In context of calculating the factorial number, the large number denotes the n value ... Read More
In C++, converting a single character into an integer is possible using various techniques like STL functions say atoi() and stoi(). Also, you can solve this with the help of ASCII value or stringstream function. Converting Single Char into Int Here, we have list down of four approaches that help to convert the single character into an integer form as follows: Using ASCII Subtraction Using stoi() Function Using atoi() Function Using stringstream Function Using ASCII Subtraction ASCII subtraction converts a digit character to an integer by subtracting '0' from it. This works because digit characters are stored sequentially ... Read More
The term Fibonacci numbers is used in mathematics, which calculates the sum of two preceding numbers that starts from 0 and 1 and continues till based on the given number say num. Mathemathematically, it is represented by: Fn = Fn-1 + Fn-2 Let us take an example to understand the above formula based on fibonacci numbers. F0 = 0 F1 = 1 F2 = F1 + F0 = 1 + 0 = 1 F3 = F2 + F1 = 1 + 1 = 2 F4 = F3 + F2 = 2 + 1 = 3 ... Read More