PadLeft¶ Pads a list on the left to a specified length. $ wo 'PadLeft[{1, 2, 3}, 5]' {0, 0, 1, 2, 3} $ wo 'PadLeft[{a, b}, 4, x]' {x, x, a, b} $ wo 'PadLeft[{1, 2, 3, 4, 5}, 3]' {3, 4, 5}