Wolfram: Padding

By Xah Lee. Date: .

Padding

PadLeft
PadLeft[{1,2,3}, 5]
(* {0, 0, 1, 2, 3} *)

PadLeft[{1,2,3}, 5, "x"]
(* {x, x, 1, 2, 3} *)

Wolfram. List Operations, and Loop, Iteration, Recursion