Arrays

This chapter introduces arrays, a common multi-dimensional data structure used to store data of the same type. (Note that a class is a "data type" in this sense.) Arrays have some number of dimensions and a number of elements in each dimension. These are established when the array is created. The range of the array's index in each dimension goes from zero to the number of that dimension's elements minus one. A for loop is commonly used to initialize, manipulate, and access the values in an array. Here, we treat one-dimensional arrays, sometimes called vectors.

10. More Complicated Example



Answer:
    C:\users\default>java ArrayEg2

cell 3: 0.0
cell 2: 2.98
cell 1: 1.43






More Complicated Example



    

        

        

        

            

        

    











    

    





    







    


Here is a more complicated example:



    
        

        

        

            
                
           
public class ArrayEg3
{
  public static void main ( String[] args )
  {
    double[] val = new double[4];  

    val[0] =  1.5;
    val[1] = 10.0;
    val[2] = 15.5;

    int j  = 3;
    val[j] = val[j-1] + val[j-2];   // same as val[3] = val[2] + val[1]

    System.out.println( "val[" + j + "] == " + val[j] );
 
   }
}

            		
        

    








Question 10:
What does the above program print out?
val [  ] ==