DEV Community: Learn Coding

Python Variables Scope Global Keyword |Local Variables

Learn Coding — Fri, 02 Dec 2022 04:06:22 +0000

What is Variable in Python and How to Create Variables in Python
Python in Variable: It is a name of storage space which is used to store data. Its value may be changed. It always contains the last value stored to it. There is no need to declare a variable in python. A variable is created by assigning a value to it.

Variable is a name which is used to refer to a memory location. Variable also known as identifier and used to hold value.

In Python, we don't need to specify the type of variable because Python is a type infer language and smart enough to get variable type.

Variable names can be a group of both letters and digits, but they have to begin with a letter or an underscore. It is recommended to use lowercase letters for variable name. and x both are two different variables.
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PHP Variables Learn| Types Variables| Declare Variables

Learn Coding — Fri, 02 Dec 2022 04:04:33 +0000

How to Create Php Variables| Php For Beginners with Examples
Php Variables: Variables is a name of storage space which is used to store data. Its value may be changed. It always contains the last value stored to it. Variables is a container which holds the value. Variable in PHP starts with dollar($) sign. In PHP, a variable is declared using a $ sign followed by the variable name. Here, some important points to know about variables.

As PHP is a loosely typed language, so we do not need to declare the data types of the variables.
It automatically analyzes the values and makes conversions to its correct datatype.
After declaring a variable, it can be reused throughout the code.
Assignment Operator (=) is used to assign the value to a variable.
What is declared syntax?

$variablename=value;

What are variables in PHP, explain with example?

<?php

$x=100;

$x=50;

$x=250;

echo "The value of x is:".$x;

*******OUTPUT*******

The value of x is:250

What is string in PHP with example?

<?php

$str="Learn Coding";

echo "I like $str";

*******OUTPUT*******

I like Learn Coding

Can you concatenate strings in PHP?

<?php

$str="Learn Coding";

echo "I like ".$str;

*******OUTPUT*******

I like Learn Coding

PHP Variables Learn| Types Variables| Declare Variables

Table of Contents
What are the rules to declare variable in PHP?

It must start with the dollar sign.
There is no need of data type (int, float, char) to define a variable.
Variables can, but do not need, to be declared before assignment.
After the dollar sign, the first letter of a variable should be alphabet or underscore(_).
After the dollar sign, the first letter of a variable should not be a digit.
After the first character, it may be a combination of alphabets and digits.
Blank spaces are not allowed in variable name.
A variable must start with a dollar ($) sign, followed by the variable name.
It can only contain alphanumeric character and underscore (A-z, 0-9, _).
A variable name must start with a letter or underscore (_) character.
A PHP variable name cannot contain spaces.
One thing to be kept in mind that the variable name cannot start with a number or special symbols.
PHP variables are case-sensitive, so $name and $NAME both are treated as different variable.
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C++ Introduction| History| Features| in Details

Learn Coding — Thu, 24 Nov 2022 04:03:35 +0000

What is the Introduction of C++?

Introduction to C++: C++ language is a basic high level and object-oriented programming language. It is supports object-oriented programming language. It is developed by Bjarne Stroustrup. It is Developed at Bell Laboratory (U.S.A.). It was developed in 1979 basically it was developed to make writing good programs.

C++ programming language is a cross-platform that can be used to create high performance any C++ application.

C++ language is a gives programmer a high level control over system resources and memory management in our C++ program.

A Brief History of C++

The Purpose of a programming language is too easy. C++ is not a new language, but one that is popularly programming language. As of this writing, the newest version of C++ is called C++22. It was ratified by the International Organization for Standardization(ISO) and published n December 2022.

C++ Connection of C Language

C++ programming language is developed by Bjarne Stroustrup at Bell Labs in 1979, C++is successor to C language. C++ was designed to be an object-oriented programming language that implements concepts such as inheritance, Abstractions, Polymorphism and Encapsulation.C++ features classes that are used to contain member data and member function. C++ is a popular compiler to have continued to support C Programming Language.
Note: Knowledge of C programming Language is not a learning of C++ language. if your goal is to learn an object-oriented programming language like C++ then you can directly.C++ you can do not need to learn a procedural languages like C Language.

What are the main features of C++?

Simple
Powerful
Portable
Machine Independent
Structure Oriented
High Level Programming language
High Speed
High Efficiency
Flexible

What C++ is used for?

Game Development
Operating Systems
Compilers
Editors
Database Systems
Networks Drivers
Graphics Packages
Interpreters

What is oops in C++?

C++ Programming language is a support object-oriented programming language like Abstraction, Inheritance, Encapsulation and Polymorphism. C++ support many features friend function, static function, and Exception and more features support in C++ programming language.

What is new in C++ 2020

C++ language is standard to have resulted in a language that is simple, easy to used for programming without compromising on the ability to write high performance applications.C++ language that is still features that are expected in the next version in 2023.

Why Use C++ Programming Language

C++ language is the one of the world's most popular programming language. C++ can be found in today's operating systems, C++ language use Graphical User Interfaces and Embedded system.C++ is an object-oriented programming language. Which gives a clear structure to programs and allows code to be reused.

Advantages of C++ Programming Language

C++ language is an intermediate-level programming language. It is versatile and can be used for high-level programming language. C++ can also be used for low-level programming of libraries that work close to the hardware, such as device drivers.C++ is the language of choice for artificial intelligence and machine learning compilers and interpreters of other programming languages.

Difference between C Language and C++ Language

C++ was developed as an extension of C and both languages have almost the same syntax.The main difference between C Language and C++ Language is that C++ Support classes and objects.But C language not support object-oriented programming language.

C++ Language Install IDE

An IDE (Integrated Development Environment) is used to edit C++ program and compile the code.You can Download C++ Software: Click Here

Syntax of C++ Programming Language

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

cout<<"Hello World";

getch();

}

************OUTPUT**********

Hello World

Description of First Program

#: It is called the preprocessor. It is included the library of C++ into the program before the execution of any C++ program.

include: C++ include the header file into the every c++ program.

iostream: C++ is a standard input/output stream function. It is a collection of predefined function and methods. It is also called library of C++.

iostream: Conio is a function in C++ language. It stands for console input/output. It is used to show the output on console window.

void: void is a keyword in C++ language. It indicates that no one value is being returned by the function. If we can use any other keyword. It is a return keyword.

main: It is a main function in C++ language. It is the function which is called the entry point of any program, the execution of any program starts from the main function.

clrscr: clrscr function is a stands for clear screen. It is a predefine function

which is used to clear the output screen. It is defined in the conio.h header file.

cout: cout function is the most important function in C++ language. It is a keyword which is used to print data or information on to the output screen.

getch: getch function is a predefined function in C++. Which is used to hold the output screen.

FAQ C++ Language

Q.1 When was C++ language introduced?Ans: C++ programming language is the best programming language. C++ language support is object-oriented programming language. C++ language, developed Bjarne Stroustrup in 1979.
Q.2 C++ Program ExamplesAns:

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

cout<<"Welcome To Learn Coding";

getch();

}

*********OUTPUT*************

Welcome To Learn Coding

Q3. What is C++ and its History?Ans: C++ Language is developed was ratified by the International Organization for Standardization(ISO) and published n December 2022.
Q4. Who is the founder of Dev C++?Ans: C++ Dev, developed by Colin Laplace and first released in 1998. It is written in Delphi. It is bundled with, and uses, the MinGW or TDM-GCC 64bit port of the GCC as its compiler. Dev-C++ can also be used in combination with Corwin or any other GCC-based compiler.
Q5. Who is the father of Oops?Ans: C++ language Ops developed in Object-Oriented programming Alan Kay, considered by some to be the father of object-oriented programming, identified the following characteristics as fundamental to OOP Kay 1993.

C++ Language Introduction Conclusion

Hello C++ Programmer, you can any problem in C++ program you can contact me.It is introduction of C++ language any suggestion.

avsTOC();

Introduction C Language |Basic|History|Syntax|

Learn Coding — Thu, 24 Nov 2022 03:58:59 +0000

What is introduction C Programming Language?

Introduction, to C Language: C language is a very powerful and general-purpose programming language. We can use C to develop software such as databases, operating systems, compilers, and many more software developed. C programming language is excellent to learn for beginners in programming. C Language is a mother language programming language in every computer programming language.

C Language that is extremely popular, simple, and flexible to use. It is a structured programming language that is machine-independent and extensively used to write various applications, Operating Systems like Windows, and many other complex programs like Oracle database, Git, Python interpreter.

introduction c language ‘C’ language is a Mother’s programming language. One can say, C is a base for the other programming. If you know ‘C,’ you can easily get the knowledge of the other programming languages that uses the concept of ‘C’

It is essential to have a background in computer memory mechanisms because it is an important aspect when dealing with the C programming language.
Table of Contents

History of C Programming Language

The base or father of programming languages is ‘ALGOL.’ It was first introduced in 1960. ‘ALGOL’ was used on a large basis in European countries. ‘ALGOL’ introduced the concept of structured programming to the developer community. In 1967, a new computer programming language was announced called as ‘BCPL’ which stands for Basic Combined Programming Language. BCPL was designed and developed by Martin Richards, especially for writing system software. This was the era of programming languages. Just after three years, in 1970 a new programming language called ‘B’ was introduced by Ken Thompson that contained multiple features of ‘BCPL.’ This programming language was created using UNIX operating system at AT&T and Bell Laboratories. Both the ‘BCPL’ and ‘B’ were system programming languages.

About C Programming Language

C language is imperative, procedural, and general-purpose in nature, developed by Dennis M. Ritchie in 1972 at the Bell Telephone for developing the UNIX OS. As of now, the C language is one of the most widely used computer languages along with Java, which is mostly used among modern programmers.

Introduction to C Programming Language

C is a programming language developed in at & T’s Bell Laboratories of the USA in 1972. It was designed and written by a man named Dennis Ritchie. C is a computer programming language. That means that you can use C to create lists of instructions for a computer to follow.
C is one of thousands of programming languages currently in use. C has been around for several decades and has won widespread acceptance because it gives programmers maximum control and efficiency. C is an easy language to learn. It is a bit more cryptic in its style than some other languages, but you get beyond that fairly quickly.
Possibly why C seems so popular is because it is reliable, simple and easy to use. Moreover, in an industry where newer languages, tools and technologies emerge and vanish day in and day out, a language that has survived for more than 3 decades has to be wonderful.

How to Learn C Programming Language

Communicating with a computer involves speaking the language the computer understands, which immediately rules out English as the language of communication with a computer. However, there is a close analogy between learning English language and learning C language. C programming language, you can read first Introduction c language.
The classical method of learning English is to first learn the alphabets used in the language, then learn to combine these alphabets to form words, which in turn are combined to form sentences and sentences are combined to form paragraphs.
Learning C is similar and easier. Instead of straight-away learning how to write programs, we must first know what alphabets, numbers and special symbols are used in C, then how using them constants, variables and keywords are constructed, and finally how are these combined to form an instruction. A group of instructions would be combined later on to form a program.

Why Learn C Programming Language?

This language is a must for those working professionals as well as students who want to become established software engineers. Here are some of the key reasons why you must learn the C language for the domain of software development:
1. This language helps users comprehend a computer’s internal architecture. It assists you in knowing how a computer would store information within and retrieve it.
2. Learning other programming languages becomes easier after learning C, such as Python, Java, etc.
3. A programmer who is well-versed with the C language gets opportunities to work on various open-source projects. For instance, some of the very popular projects (open-source) have been written using the C programming language, such as Python interpreter, Linux kernel, SQLite database.

Difference between C and C++

C++ was developed as an extension of C, and both languages have almost the same syntax.
The main difference between C and C++ is that C++ support classes and objects, while C does not

Benefits of C Programming Language

Here are a few reasons why programmers choose the C language for running a program: It is a structured language.

The C language is very easy to understand and learn.
The C language generates very efficient programs.
It helps you handle various low-level activities.
The compilation of C programs can occur on various computer programs.

Applications of a C Language

This language was initially utilized for the development of systems- particularly those programs that would make up an OS (Operating System). The C programming language was adopted in the form of a language for system development, since it generates codes that run as fast as those codes that exist in the assembly language. Here are a few examples of how we can use the C language in development:

Operating Systems
Text Editors
Assemblers
Network Drivers
Print Spoolers
Modern Programs
Language Interpreters
Databases
Utilities

Features of a C Language

Simple
Easy To Used
Powerful
Portable
High Efficiency
Mid-Level Programming Language
Machine Independent
Structure Oriented
Flexible.

Uses of the C Programming Language

Procedural Language: The execution of the instructions present in a C program happens step by step.
Speed: The C language is much faster as compared to a majority of the programming languages, such as Python, Java, and many more.
Portable: A C program can be moved from any given platform to another one, and we can also run it on that platform without any of the charges.
General Purposes: We can use the C programming language for developing operating systems, databases, embedded systems, etc.

C Language Program File

All the C programs are written into text files with extension ".c" for example hello.c. You can use "vi" editor to write your C program into a file.

This tutorial assumes that you know how to edit a text file and how to write programming instructions inside a program file.

C Language Compilers

When you write any program in C language, then to run that program you need to compile that program using a C Compiler which converts your program into a language understandable by a computer. This is called machine language (i.e. binary format). So before proceeding, make sure you have C Compiler available at your computer. It comes along with all flavors of Unix and Linux.

If you are working over Unix or Linux, then you can type GCC -v or cc -v and check the result. You can ask your system administrator, or you can take help from anyone to identify an available C Compiler at your computer.

C Program File Extension

introduction C language: All the C programs area units written into text files with extension ".c" for example learncoding. c. you'll be able to use the "notepad" editor to write down your program into a file.

C program assumes that you just edit a computer file and write down programming instructions within a program file.

Summary of C Programming Language

‘C’ Programming language was developed by Dennis Ritchie in 1972.
It is a robust language.
It is a low programming level language close to machine language
It is widely used in the software development field.
It is a procedure and structure oriented language.
It has the full support of various operating systems and hardware platforms.
Many compilers are available for executing programs written in ‘C’.
A compiler compiles the source file and generates an object file.
A linker links all the object files together and creates one executable file.
It is highly portable programming language.

Syntax of C Programming Language

#include<stdio.h>

#include<conio.h>

int main()

{

printf("Welcome To Learn Coding Website");

}

getch();

}

**OUTPUT**

Welcome To Learn Coding Website

Syntax Description C Program

#include<stdio.h>: Studio function is the first. Line of our code. # symbols represent a preprocessor in the c language program. When the program is the execution of tells. Include line is the C program, the first line of code. It stands for standard input-output function.
Conio(): conio function is the c language predefined function.it is the console input/output function.
Void(): void function is the keyword of c language. Void keyword is returned by the function.
Main(): main() function here The execution of any program starts from the main function. Clrscr(): clrscr function can be used for the clear output screen of our computer.
Print(): print function is the most useful function in the c programming language. The print function is the predefined function in the c library. Print function using the output screen of our program.
Getch(): getch function is the c language function.it can be used to hold the output screen.

FAQ C Programming Language

Q.1 What is C language simple definition?Ans: C language is a basic general-purpose programming language. It is a base of all high level programming language so it is called basic programming language.
Q.2 What is C and its features?Ans: Simple, Powerful, Portable, Machine Independent, Structure Oriented, Mid-Level, High Speed, Flexible.
Q.3 What is C language best definition?Ans: C is a programming language developed in at & T’s Bell Laboratories of the USA in 1972. It was designed and written by a man named Dennis Ritchie. C is a computer programming language
Q.4 What is introduction in programming?Ans: C language is a basic general-purpose programming language. It is a base of all high level programming language so it is called basic programming language. C is a programming language developed in at & T’s Bell Laboratories of the USA in 1972. It was designed and written by a man named Dennis Ritchie. C is a computer programming language

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