## WHO Describe Currently Defined Variables

Section: Inspection Functions

### Usage

Reports information on either all variables in the current context or on a specified set of variables. For each variable, the `who` function indicates the size and type of the variable as well as if it is a global or persistent. There are two formats for the function call. The first is the explicit form, in which a list of variables are provided:

      who a1 a2 ...

In the second form

      who

the `who` function lists all variables defined in the current context (as well as global and persistent variables). Note that there are two alternate forms for calling the `who` function:

      who 'a1' 'a2' ...

and

      who('a1','a2',...)

### Example

Here is an example of the general use of `who`, which lists all of the variables defined.

    --> c = [1,2,3];
    --> f = 'hello';
    --> p = randn(1,256);
    --> who
      Variable Name      Type   Flags             Size
                  c     int32                    [1 3]
                  f    string                    [1 5]
                  p    double                    [1 256]

In the second case, we examine only a specific variable:

    --> who c
      Variable Name      Type   Flags             Size
                  c     int32                    [1 3]
    --> who('c')
      Variable Name      Type   Flags             Size
                  c     int32                    [1 3]