Using params keyword with a multidimensional array

Question

Why it is compile time error when we use the params keyword with a multidimensional array?

using System;

namespace Testing_Params_Keyword
{
    class Program
    {
        static void Main(string[] args)
        {
            //Calculate in invoked
            Calculate(25.4, 26.2, 27.8, 28.9);
        }

        //Declearing Calculate method
        public static void Calculate(params float [ , ] Money)//----** Here is error **
        {
            //Divide values of column1 by column2
            float row1 = Money[0, 0] / Money[0, 1];
            float row2 = Money[1, 0] / Money[1, 1];

            Console.WriteLine(row1 + row2);
        }//end of method Calculate
    }
}

Gives me the error

The params parameter must be a single dimensional array

Why it must be single dimensional array?

Because "The params parameter must be a single dimensional array". — Cheng Chen
– Cheng Chen, Commented Jun 3, 2016 at 9:15
you can instead use a own class with the params in it and use this function with a List<yourclass> — M. Schena
– M. Schena, Commented Jun 3, 2016 at 9:18
How exactly would you expect the code to determine the valid dimensions of the array? — Anthony Pegram
– Anthony Pegram, Commented Jun 3, 2016 at 9:19

Leniel Maccaferri · Accepted Answer · 2021-08-17 20:11:45Z

10

params isn't about passing multi dimensional data, it's about passing a variable number of arguments to a function. Since that list of arguments is inherently one dimensional that's why the type has to be a one dimensional array.

edited Aug 17, 2021 at 20:11

Leniel Maccaferri

103k48 gold badges381 silver badges495 bronze badges

answered Jun 3, 2016 at 9:16

Sean

62.8k11 gold badges101 silver badges138 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Eyal Perry · Accepted Answer · 2019-03-12 11:21:37Z

7

Because everything the C# compiler does, albeit magical- must have some kind of logic behind it. The params keyword just creates an array whose size is the amount of parameters you have passed.. this is something that the compiler can establish.. It can not, however, infer the amount of dimensions which you intend, or even the amount of elements per dimension. Therefore- what you attempt to do could never compile.

edited Mar 12, 2019 at 11:21

answered Jun 3, 2016 at 9:19

Eyal Perry

2,28519 silver badges26 bronze badges

Comments

Shon · Accepted Answer · 2016-06-03 09:48:09Z

-2

It is because the params varible is based on command line arguments where the command runs after pressing enter. This method does not allow for multiple dimensions and therefore is reflected in the varible as the compiler kbows this.

answered Jun 3, 2016 at 9:48

Shon

4864 silver badges9 bronze badges

Collectives™ on Stack Overflow

Using params keyword with a multidimensional array

3 Answers 3

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related