TechWise

What are functions in programming?    Functions are a fundamental concept in programming. They are blocks of code that perform a specific task and are designed to be reusable. Functions are also known as subroutines or procedures, and they are used to organize and modularize code, making it easier to read, understand, and maintain.   Functions can take input, called arguments, and they can also return output, called a return value. Functions are defined with a specific name and a list of parameters, and they are called by name, passing in the required arguments. The function performs its task and then returns control to the code that called it, along with any return value.   Functions are a key feature of many programming languages, including C, C++, Java, Python, and JavaScript. They allow for code reuse and make it easier to test and debug code by breaking it down into smaller, more manageable units.   There are several types of functions in programming, including:   1.        Built-

  What are lists in programming?              Lists are a data structure in programming that stores an ordered collection of items. The items can be of any data type, such as integers, strings, or objects, and they are often called "elements" or "items." Lists are a fundamental data structure in many programming languages and are used to store and manipulate collections of data.   Lists are often implemented as arrays, which are contiguous blocks of memory that store the elements of the list. The elements of the list are accessed by their position in the array, called an index. Lists can be used to perform operations such as adding, removing, and searching for elements, as well as sorting and iterating through the elements.   In many programming languages, lists are also known as arrays, sequences, or collections. The specific implementation of lists and the available operations may differ between languages, but the basic concept is the same.   Types of lists:   The

  Divisibility Rules   1. Divisibility by 2 A number is divisible by 2 if it has any of the digits in one’s place 0,2,4,6,8    Ex. 654/2 = 327 2. Divisibility by 3 If the sum of the digits of a number is a multiple of 3, then that number is divisible by “3”   Ex 1) 24 = 2+4= 6 is divisible by 3       2) 129 = 1+2+9 = 12 = 1+2 = 3 divisible by 3       3) 12345 = 1+2+3+4+5 = 15 = 1+5= 6 is divisible by 3 3. Divisibility by 4 A number with 3 or more digits is divisible by 4. If the number formed by its last two digits (ones, tens) is divisible by 4. And also, 0 in both places.   Ex. 312 &1312 both have 12 in at last two digits which is divisible by '4' 4. Divisibility by 5 The number with 0 and 5 in one’s place is divisible by 5   Ex. 750/5 = 150  5. Divisibility by 6 .  If the number is divisible by both 2 and is divisible by 6 too.   Ex.  8430 is divisible by 2 and 3 thus it is also divisible by 6 6. Divisibility Rule 7 A Number with 3 digits or more by divisible by 7, If th

  What are procedures in programming?   Procedures, also known as subroutines or functions, are blocks of code in a program that perform a specific task. They are designed to be reusable, so that the same task can be performed multiple times without having to write the same code over and over again. Procedures can take input, called arguments, and they can also return output, called a return value. They are commonly used to organise and modularise code, making it easier to read, understand, and maintain.   Types of procedures:   There are several types of procedures in programming, including:   1.       Subroutines:  Also known as "procedures," these are blocks of code that perform a specific task and do not return a value. 2.       Functions:  Similar to subroutines, functions are blocks of code that perform a specific task. However, they do return a value. 3.       Constructors:  These are special types of procedures that are used to create and initialise objects in object-

  What are events in programming? In programming, an event is a user action or system occurrence that triggers a specific response in the program. Examples of events include a button press, a mouse click, a key press, a timer expiration, or the arrival of data from a network connection. Events are typically handled by event handlers, which are blocks of code that execute in response to the event. Event-driven programming is a programming paradigm in which the flow of a program is determined by events and their corresponding handlers, rather than by the program's sequential execution. Types of events: There are many different types of events in programming, but some common examples include: User interface events: These include events such as button clicks, menu selections, and key presses. Mouse events: These include events such as mouse clicks, mouse movement, and mouse hover. Keyboard events: These include events such as key presses and key releases. Timer events: Thes

 What are strings?      A string is a sequence of characters, typically used to store and manipulate text. They are often enclosed in quotation marks and can contain letters, numbers, and symbols. Strings are a common data type in many programming languages and are used in a variety of ways, such as representing text, storing user input, or formatting output. In most programming languages, strings are considered to be immutable, meaning that the contents of a string cannot be changed once it has been created. Types of strings:      There are a few different types of strings that are used in programming, including:   Literal strings: These are strings that are written directly into the code, enclosed in quotation marks. For example, "Hello, World!" is a literal string. Variable strings: These are strings that are stored in a variable, and can be changed throughout the program. For example, in Python, you might create a variable called "name" and set it eq

  What are loops? In computer programming, a loop is a control flow statement that allows code to be executed repeatedly based on a given Boolean condition. There are several loops, including loops, while loops, and do-while loops. These control structures enable a programmer to efficiently write code that can iterate over a range of values, perform a certain number of iterations, or continue executing until a certain condition is met. Loops are a fundamental building block in many programming languages and are used in a wide range of applications.   How do we use loops in programming?   Loops are used in programming to perform a set of instructions repeatedly until a specific condition is met. The basic structure of a loop includes a control statement that defines the condition for the loop to continue executing and a block of code that is executed each time the loop iterates.        For example, a for loop is used to iterate over a range of values. It has three parts: a

  What are variables? A variable is a storage location in a computer's memory that holds a value or a reference to a value. The value stored in a variable can be of various data types, such as numbers, strings, and objects. The variable has a name that is used to reference its value in the program. The value of a variable can be changed during the execution of the program. In programming, variables are used to store data values in order to manipulate and use them in various operations and computations.  How do we use variables?   Assigning a value to a variable: This is the most basic use of a variable. You can assign a value to a variable using the assignment operator (=). For example, in Python, you can use the following code to assign the value 5 to the variable x: x = 5                                                               Using a variable in an expression: Once a variable has a value, you can use it in mathematical or logical expressions. For example, you can u