There are several databases that can be used in Android, including SQLite, Room, and Firebase Realtime Database. In this article, you will learn how to perform a simple database operation using Android Room. What is...
How to Handle Exceptions in Java
In this article we will look at what is an exception?, what is exception handling?, and how java supports exception handling. In general, the errors in programs can be categorized into three types: Syntax...
Check if a String Contains a Substring in JavaScript
In JavaScript, checking if a string contains a substring is a common task that can be achieved in a number of ways. In this post, we will explore different methods to determine if a given string contains a substring...
Calculating the Area of a Circle and Cylinder using the ‘super’ Keyword in Java
Java program that calculates the area of a cylinder and a circle using the super keyword: import java.util.*; class Shape { double radius; Shape(double r) { radius = r; } double area() { return 0.0; } } class Circle...
Calculating the Surface Area and Volume of a Cylinder in PHP
PHP program that accepts the dimensions of a cylinder and prints its surface area and volume: <?php function surfaceArea($radius, $height) { return 2 * pi() * $radius * $height + 2 * pi() * pow($radius, 2); }...
PHP Script to Demonstrate Arithmetic Operators, Comparison Operator, and Logical operator
Problem: Write a php script to demonstrate arithmetic operators, comparison operator, and logical operator. Solution: PHP script that demonstrates the use of arithmetic operators, comparison operators, and logical...
PHP Script to Display a Welcome Message
Problem: Write a php script to display welcome message Solution: Here’s a simple PHP script that displays a welcome message <!DOCTYPE html> <html> <head> <title>Welcome...
What is Matrix in R? Explained with Examples
In R, a matrix is a two-dimensional array of data, with rows and columns. Matrices are often used to store and manipulate data sets in a compact and efficient manner. What is Matrix? A matrix is a two-dimensional array...
Program to find third largest number among in an Array using Java
An example Java program to find the third largest number among five numbers: import java.util.Scanner; public class ThirdLargest { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int[] nums...
Program to find second largest number among a List in Python
Here is an example of how to find the second largest number in a list in Python: #code4example.com def second_largest(numbers): first = second = float('-inf') for n in numbers: if n > first: second = first first = n...
C# .NET Web Application Tech Stack: Choosing a Database
Choosing a database for a C# .NET web application is an important decision as it affects the performance, scalability, and cost of the application. The following are the most popular database options for C# .NET web...
R Program to Multiply Two Matrix Using Multi-dimensional Arrays
In R, a matrix is a two-dimensional array-like data structure, where elements are stored in rows and columns. Matrices are a powerful data structure for numerical computations and are commonly used in many areas...