Use a list with single number for the second input of Table

Question

As you see both inputs below give the same results. Is there any reason to use List[3] instead of just 3 in the first case?

Table[1,{3}]
(* {1,1,1} *)

Table[1,3]
(* {1,1,1} *)

Answer 1

If you're before v10.3, then only the first syntax is correct. For more information check:

Why does Table behave differently in Mathematica compared to WolframCloud?

BTW this syntax change causes problem in certain cases:

Unexpected behaviour from Table[]