Basic concepts of programming.

Today we are going to learn some basic concepts of programming this concepts are applicable on all programming languages. 
So, Lets begin.... 

 Basic Concepts of Programming.

*Variable.

It is a symbolic name or reference to some kind of information.

A variable is a virtual container whose value can 

change over a period of time.

int roll = 10; // roll is a variable

*Conditional Statements.

These are expressions that ask the program to determine if a variable is true or false.

There are two possible ways:

1. True – Action1

2. False – Action2

*Looping and Iteration

Iteration is any time a program repeats a process or sequence.

*Datatypes

Data types help classify what information a variable can hold and what can be 

done with it.

Numbers

Decimal 

Booleans

Characters

Strings

*Functions

These are self contained modules of code that accomplish a particular task.

Methods with no return type :

public void add(int num1, int num2){

int sum = num1 + num2;

System.out.println(“Sum of two numbers are : ”+sum);

}

Methods with return type :

public int add(int num1, int num2){

int sum = num1 + num2;

return sum;

}