Reverse Polish notation (RPN) is a mathematical notation in which operators follow their operands. It is also known as postfix notation. In RPN, the operator is placed after the operands, unlike infix notation (traditional mathematical notation) where the operator is placed between the operands. For example, in infix notation, the expression 2 + 3 is […]
Reverse Polish notation in data structure Read More »
These SQL (Structured Query Language) commands are mainly categorized into four categories: DDL – Data Definition Language DQl – Data Query Language DML – Data Manipulation Language DCL – Data Control Language DDL (Data Definition Language) A database system provides a data-definition language (DDL) to specify the database schema List of DDL commands: • CREATE•
DDL, DQL, DML, DCL, and TCL Commands Read More »
Mathematical Notions And Terminology Previous Next As in any mathematical subject , we begin with a discussion of the basic mathematical objects, tools, and notation that we expect to use. SET A set is a group of objects represented as a unit. Sets may contain any type of object, including numbers, symbols, and even
Mathematical Notions And Terminology Read More »
What is a Linked List? A Linked List is a very commonly used linear data structure that consists of a group of nodes in a sequence. Each node holds its data and the address of the next node hence forming a chain-like structure. Concept of linked list You have to start somewhere, so we give
What is a Linked List Read More »
Data Structures and Algorithms GO TO COURSE NEXT Data structures and Algorithms (DSA) in Computer Science It is believed that data structures and algorithms are the basics of computer science. It is actual computer science. Any developer or CS student must write code that provides a required output. Algorithms are methods to implement certain tasks
Data Structures And Algorithms Overview Read More »
C++ allows us to perform operations on files. We can read contents of a file and even write some content in the file through a C++ program. Isn’t that awesome? To perform operations on files, C++ provides several built-in functions. These functions are all declared in fstream header file. To perform operations on file, the fstream and iostream header files should
File operations in C++ | c++ Advanced | Part – 12 Read More »
We brush our teeth every day. But do we make the toothpaste? Someone already made the toothpaste which we are directly using. Similar is the purpose of a header file. Header files are files containing functions, variables, data-type definitions and constants that can be used within the programs. We use a preprocessor directive #include to include header
Header files in C++ | c++ Advanced | Part – 11 Read More »
What do you do when you see a speed breaker in front of you? You apply brakes, right? The speed breaker breaks down your normal speed. This is exactly what exception does to our program. Exception is an event that disrupts the normal flow of the program. Exceptions are the errors which occur during the execution of the
What is an exception? | c++ Advanced | Part – 10 Read More »
Consider we have to write classes for animals which displays their voices. We will require different classes for different animals. But there are a lot of features which are same across these animals. We keep all these similar features in a single class, like a template and extend this class for specific animals. Interfaces also
What is an interface? | c++ Advanced | Part – 9 Read More »
Imagine you have a water bottle which is filled with water upto the brim. There are two marbles present inside the water bottle. Can you pull these marbles out without spilling the water? What if you are given a pair of tongs? You can, right? Encapsulation is a concept which describes the idea of bundling data
What is encapsulation? | c++ Advanced | Part – 8 Read More »
