I have a question a specific part on this two dimensional area

Question

Please explain this specific part of array
Console.WriteLine("a[{0},{1}] = {2}", i, j, a[i,j])

https://code.sololearn.com/cKn1t7h5woyI/?ref=app

Answer 1

No. Thats just one charecter displayed as it is in the output... See that replacing by that with any other charecter..
And
Check by replacing this for observation:
Console.WriteLine("A{0}", i);

Answer 2

Your 2d array is
j=0. j=1
i=0 0 0
i=1. 1 2
i=2 2 4
i=3 3 6
i=4 4 8
Now see, what not you understanding..?

Answer 3

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{

/* an array with 5 rows and 2 columns*/
int[,] a = new int[5, 2] {{0,0}, {1,2},
{2,4}, {3,6}, {4,8} };
int i, j;

/* output each array element's value */
for (i = 0; i < 5; i++)
{

for (j = 0; j < 2; j++)
{

Console.WriteLine("a[{0},{1}] = {2}",
i, j,a[i,j]);

}

}
Console.ReadKey();
}
}
}

/* I am trying to understand this part specifically.

Console.WriteLine("a[{0},{1}] = {2}", i, j, a[i,j])

*/

Answer 4

Console.WriteLine("a[{0},{1}] = {2}",
i, j,a[i,j]);

{0} is replaced by 0th (first) argument's value after the string argument in output string..
Here {0} by i value...

{1} by next arguments value, here by j value..
{2} by next arguments value, here by a[i, j]..
This continues, if any further there..

Answer 5

I guess I don't understand what the = sign is doing here. Is it that = sign is assign the value of {2} to a[i,j} ?

Thanks

Answer 6

Thanks still trying to figure it out but getting close. When I replace the code with
Console.WriteLine("A{0}", i);

the output is
A0
A0
A1
A1
A2
A2
A3
A3
A4
A4

Answer 7

Why is the there double number shown like?
A0
A0
A1
A1

etc

Answer 8

Iam taking about, only observe the specific line.. In output.. There inner loop, I value not changing.. J value changes from 0 to 2-1.. And outputing I value not j,.. Replace I with J, then see..

Or check that extra example, I said in only one separate loop

Answer 9

making more sense so for example in the inner for loop.
for (j = 0; j < 2; j++)
it executes
first iteration at 0
second iteration at 1
third iteration at 2 which is not greater than 2 so the loop stops. That is why there is
A0
A0

A1
A1

A2
A2

etc

Answer 10

Still figuring it out though how the = {2} is outputting 0
The first line on the output is
a[0,0] = 0 for example.
I understand the a[0,0] output perfectly

Answer 11

Yes.. But now your doubt changed to loop from concole..!!!!!

Answer 12

I think I got it now, working through the last of the logic.

Answer 13

I got thanks. Breaking down like that made the difference thanks

Answer 14

Thanks for your help yesterday.

Jayakrishna🇮🇳