Well first u have to know what Instant messaging is .When you instant message a person, you usually find a friend at your school or work who also have the same messenger system. Then you download either yahoo messenger or aol messenger which are both free of cost and viruses.Texting is just the same Only difference is data and how u have to pay to text. I hoped i helped
 
        
                    
             
        
        
        
Answer:
Read Books, Search the Internet, etc...
Explanation:
 
        
             
        
        
        
<span>It is a Compound machine.</span>
        
                    
             
        
        
        
Here you go,
import java.util.Scanner;
import java.util.Random;
public class OrderCalculator{
 public static void main(String[] args){  
 float x, y, z, semi, area;
 Scanner in = new Scanner(System.in);
 System.out.print("Enter the 3 sides: ");
 x = in.nextFloat();
 y = in.nextFloat();
 z = in.nextFloat();
 semi = (float) ((x + y + z) / 2.0);
 area = (float) Math.sqrt(semi * (semi - x) * (semi - y) * (semi - z));
 System.out.printf("The area is: %.3f\n", area);
 }
}