How to extract number of fields and name of fields from a structure?

I have s.a = 1; s.b = 'abc'; s.c = []; How to extract the name of the fields: 'a', 'b', 'c'? And the number of fields: 3 (in this example)?

Answer 1

[kintali narendra]

use length(fieldnames(structure)) to find the number of fields in a structure. In your case it is length(fieldnames(s)). To get the fieldnames use fieldnames(structure) in your case fieldnames(s) store the output in a different variable and call them.

Answer 2

[Image Analyst]

Use the fieldnames() function.