Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
A semicolon in C++ is used to terminate or end the statement; it tells the compiler that this particular instruction is completed.According to the ISO C++ specifications, the lexical representation of C++ programs (breaking down code into small parts) is called tokens. Some of these tokens are punctuators, which are special symbols used to structure your code. The semicolon is one of these punctuators. Example Here is the following basic example code showcasing the working of a semicolon in C++. #include using namespace std; int main() { int x = 5; // End of declaration statement x = 10; // End of assignment statement cout
In C++, a vector is a dynamic array that can grow or shrink automatically. It can store elements in a row (contiguous memory) and resizes itself when needed. When it runs out of space, it creates a bigger array, copies the old data, and adds the new one. So, you can easily add, remove, or access elements using functions like push_back(), size(), and erase(). Basic Operations (push_back, access) A vector stores elements in a contiguous memory block. You can add elements using push_back() and access them using [] or at(). Syntax Following is the syntax is as follows: vector vec; ... Read More
Bitwise operators are used for representing binary integers, where the operator directly performs operations on the individual bits of integer values. To perform an addition operation using bitwise operators, use operators like AND, XOR, and NOT. The OR operator cannot perform addition on its own because, 1 | 1 results in 1, but we need 2 as the output. Therefore, you can use the other three operators to implement the logic of addition. You can see the tabular representation of biwise operators by taking binary bits as 0 and 1. ... Read More
The given task is to convert the numerical values to their respective word representation (i.e, we need to spell the numbers in text ). For example, if the given numbers are 1, 2, 29, the resultant values would be: one, two, twenty-nine, respectively. We can do so, using the function(s) available in the num2word library. Converting Numbers to Words Using num2word() The num2words() is a function of the Python library with the same name (num2words). This is used to convert numbers like 56 to words like fifty-six. In addition to the numerical parameters, this function accepts two optional parameters - ... Read More
A global variable is a variable with global scope, meaning it is visible and accessible throughout the program. The collection of all global variables is known as the global environment or global scope of the program. The variables declared outside the function are, by default, global variables. We use the global keyword before a variable inside a function or method to indicate that we are referring to the global variable rather than creating a new local one. The following is the syntax to declare a global variable inside a function ... Read More
The asterisk (*) operator in Python has more than one meaning attached to it. We can use it as a multiplication operator, a repetition operator, for unpacking the iterables, and as a function *args. A single asterisk, as used in a function declaration, allows a variable number of arguments to be passed from the calling environment. Inside the function, it behaves as a tuple. As the multiplication operator Generally, the start (*) operator is used for multiplication purposes. For numeric data, the asterisk (*) is used as a multiplication operator. Let’s take an example and see how the star operator works ... Read More
In this article, we will learn to add/insert a JCheckBox inside a JTable cell in Java. JTable is a powerful component for displaying and editing data in tables. A frequent requirement is to add checkboxes to table cells for boolean data or selection. JTable A JTable is a subclass of the JComponent class, and it can be used to create a table with information displayed in multiple rows and columns. Syntax The following is the syntax for JTable initialization: JTable table = new JTable(); When a value is selected from a JTable, a TableModelEvent is generated, which is handled by ... Read More
In this article, we will learn to implement the HTML text of a JButton in Java. The Swing JButton component has a useful feature in which developers can use HTML to style button labels. This feature enables us to make buttons appear more appealing by using simple HTML elements in our Java applications. What is a JButton? A JButton is a subclass of AbstractButton, and it is an important component in the Java Swing hierarchy. A JButton can be used mostly in login-based applications. Syntax The following is the syntax for JButton initialization: JButton button = new JButton("Button"); A JButton ... Read More
In this article, we will learn to disable the cut, copy, and paste functionality of a JTextArea in Java. While developing Java Swing applications, you may need a situation where you want to restrict user input to text components. Cutting, copying, and pasting is usually needed to be disabled for a JTextArea such that users are not allowed to modify or copy its content. What is a JTextArea? A JTextArea is a subclass of the JTextComponent class, and it is a multi-line text component to display text or allow a user to enter text. A JTextArea can generate a CaretListener interface ... Read More
Let's understand the title: converting a string to a Python class means accessing a Python class using its name stored as a string, allowing dynamic creation of objects at runtime. In this article, we will discuss different ways to convert a string to a Python class object. Using globals() Function The globals() function is used to convert a string to a Python class object when a class is in global scope. class Bike: def start(self): print("Bike started!") class_name = "Bike" cls = globals()[class_name] # Convert string to class obj ... Read More