What is the basic of programing?

When you start programming

Do learn :

1) : Constant

2): Keywords

3): Variables

1): Constant :

Not changing or varying; uniform; regular; invariable: All conditions during the three experiments were constant. continuing without pause or letup; unceasing: constant noise. regularly recurrent; continual; persistent: He found it impossible to work with constant interruption.

Example of constant in Java

import java.util.Scanner;
public class ConstantExample1.
{
//declaring constant.
private static final double PRICE=234.90;
public static void main(String[] args)
{
int unit;

2): Keywords :

In the Java programming language, a keyword is any one of 52 reserved words that have a predefined meaning in the language; because of this, programmers cannot use keywords as names for variables, methods, classes, or as any other identifier.

Examples of keywords are the primitive types, int and boolean; the control flow statements for and if; access modifiers such as public, and special words which mark the declaration and definition of Java classes, packages, and interfaces: class, package, interface.

3): Variables

A variable is a name given to a memory location. ... The value stored in a variable can be changed during program execution. A variable is only a name given to a memory location, all the operations done on the variable effects that memory location. In Java, all the variables must be declared before use.

String - stores text, such as "Hello". ...
int - stores integers (whole numbers), without decimals, such as 123 or -123.
float - stores floating-point numbers, with decimals, such as 19.99 or -19.99.
char - stores single characters, such as 'a' or 'B'.

Extensive parts of programming languages are followings:

Programming Environment

Data Types

Variables

Variables are the very essential part of a program.

An example of C program:

#include<stdio.h>

void main()

{

int i;

// here 'i' itself is a variable that can be declared any number and it can be changed with the program

for(i=10; I<=10 i++){

printf("%d", i);

}

Keywords

Keywords are the very essential part of a program.

There are 32 keywords in C language like : int, char, float, void,

An example of C program:

#include<stdio.h>

void main()

{

int i;

// here 'int' itself is a keyword in the program that declares the type of constant that cannot be changed

for(i=10; I<=10 i++){

printf("%d", i);

}

Logical and Arithmetical Operators

Arithmetic Operators: These are the operators used to perform arithmetic/mathematical operations on operands. Examples: (+, -, *, /, %,++,–). The arithmetic operator is of two types: Unary Operators: Operators that operate or work with a single operand are unary operators.

If else conditions

An if statement can be seen in the C program

#include<stdio.h>
int main(){
int number=0;
printf("enter a number:");
scanf("%d",&number);
if(number==10){
printf("number is equals to 10");
}

Loops

Two major types of loops are FOR LOOPS and WHILE LOOPS. A For loop will run a preset number of times whereas a While loop will run a variable number of times. For loops are used when you know how many times you want to run an algorithm before stopping.

Numbers, Characters, and Arrays

1- In C Language:

The example:

2- In Java Language:

Initializing Char Array

A char array can be initialized by conferring to it a default size. char [] JavaCharArray = new char [ 4 ]; This assigns to it an instance with size 4

3- In Python

Example

Functions

Type of Function

Input and Output Operations

The Python programming language provides an input() function to take input into a program from the console. You will need to typecast the input to the desired type because the entered value is always returned as a string. Using the split() method, we can take multiple values in one line.

Examples