I'm used to using Ctr+_ to create indexes for variables (which evaluates to something like Subscript[a,i,j]), but on this site I often see people giving answers with the form a[i,j]. I find the compact 'visual' subscript to be easy to read and I'm always a little startled when I read the brackets. I'm guessing the bracket form is used on this site because of the Markdown code format.
Is there a strength/weakness to either?
Cleardoes not work on subscripted symbols for an example of how this can trip you up. – rm -rf Nov 16 '15 at 01:51a=Table[a[i,j],{i,1,n},{j,1,m}]is still a no-no? I know to avoid naming things with capital letters, but 'capital matrices and lowercase entries' is a hard habit to change, and using different letter for the entries and the matrix makes it hard to connect them mentally. – Travis Bemrose Nov 16 '15 at 02:34Format[a[i_, j_]] := Subscript[a, i, j]– Bob Hanlon Nov 16 '15 at 02:54