Question

help with arrays?

Answer 1

\[\begin{bmatrix} a & r& r\\ a&y&s\end{bmatrix}?\]

Answer 2

Given an array iArray of int type, declared to contain 50 elements, and a variable dVar of double type which has been assigned a value. Write an expression that assigns the value stored in the variable dVar to the last element of the array iArray.

Answer 3

arrays in java

Answer 4

sorry but i am yet to understand the language java

Answer 5

okay

Answer 6

You would have to convert the double value to an int first, so it can be stored into the array.

double d = dVar;
int i = (int)d;

iArray [49] = i;

Answer 7

Understand?

Answer 8

iArray[49] = dVar;

Answer 9

You can't just store dVar into iArray because iArray is an array of int type, dVar is of double type.

double d = dVar; //storing the value of dVar in d
int i = (int)d; // using cast to convert double to integer
iArray [49] = i; // storing the converted value into 50th element of array

The first line may be unnecessary, I just like to simply things.
You could also have done:

int i = (int)dVar;
iArray [49] = i;

Of course this is assuming, the array iArray and variable dVar have already been declared.

Answer 10

thanks

Answer 11

i need with Echo command line...can you help me with that too?

Answer 12

public class EchoB {
public static void main (String[] args) {
System.out.println("Hello" + args[0] + " " + args[1]);
}}

What would be the output from this EchoB program if we invoke this program with the following command?


java EchoB "How Are You?"

Answer 13

Assuming How, Are, You are 3 different arguments.
The output would be "HelloHow Are"

If it were:

public class EchoB {
public static void main (String[] args) {
System.out.println("Hello" + args[0] + " " + args[1] + args [2]);
}}

The output would be HelloHow AreYou

Answer 14

Wow, I could have used this kind of help when I was taking a java course

Answer 15

can you still help ?

Answer 16

Please. I gave up on Java a long time ago. The next time I take a Java course, it will be with my personal tutor.

Answer 17

haha

Answer 18

go ask this in comp sci