Relational Operators in programming

This operator used in programming to make a decision making. this operator is answer by true or false or yes or no only. the program execute depending on the result of operations.

These are the Relational Operators
>          greater than
>=       greater than or equal
<         less than
<=      less than or equal
==      equal
!=       not equal

Java Operators

Programming Operators are use in computing the numbers using programming.

here are the the operators used in programming.

   name         Symbols
1. Addition                    +
2. Subtraction               -
3. Multiplication          *
4. Division                    /
5. Modulo                   %           - this operator used to get the remainder

Escape sequence in programming

This are the common escape sequences in programming.

\n     - newline.
\t      - Horizontal Tab
\r     - Carriage return
\\     - Backslash
\"     - Double Quote

IF ELSE statement sample program

This program will compute the 3 grades and get the average. the program will show a message "Your Passed" if the average is 75 above. else the program will show a message " Your Failed" if the average is Below 75.

here is the program.

import java.io.*;

public class ComputeAverage
{
public static void main(String args[])
{
//declaration of variables
int math=90;
int PE=90;
int prog=95;
int ave=0;

//Compute the average

ave=(math + PE + prog)/3;

//display the average
System.out.print("Your average is:" + ave);


//checking the average if it is 75 above or below 75 using if statement

if(ave>=75)
{
System.out.print("Your Passed");
}
else
{
System.out.print("Your Failed");
}

}
}

IF ELSE sample program

This program will determine the age of person if 18 above  or 18 below. the program will show message " Your qualified to vote" if the age of person is 18 above, else the program will show message " Your not qualified to vote" if the age of person is 18 below.

here is the sample program.

import java.io.*;

public class SampleIf
{
public static void main(String args[])
{
//declaration
int age=18;

if(age>=18)
   {
     System.out.println("Your Qualified to Vote");
    }
else
   {
    System.out.print("Your not Qualified to vote");
   }
}

}

If Statement

IF statement - is a conditional statement.

syntax:

if(conndition)
{
statement 1;
}

IF ELSE - also conditional statement that the program will choose the true statement or false statement depending on thier condition.

syntax:
if(condition)
{
statement 1;
stmt 2;
}
else
{
statement 1;
stmt 2;
}

Sample Program Using Class and Objects

I will create a program using classes and objects. I Used two class name which are MainProgram and Message.

In class name MainProgram, the user will input thier name, and this input data will pass to class Message to print.

Program Code:

import java.io.*;
import java.util.Scanner;

public class MainProgram
{
public static void main(String args[])
{
Scanner input=new Scanner(System.in);
String name="";
System.out.print("Enter your name:");
input=name.nextLine();

//calling the class
//create an object to call the method in class Message
Message x = new Message();
x.printing(name);
}
}

Class Program:

class Message
{
public void printing(String nm)
{
System.out.print("Your name is:" + nm);
}
}

If you run this program you go to the MainProgram . The mainProgram will process all class program.

Output:

Your name is: Jaypee