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PadLeft

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PadLeft[list, n]

pads list to length n by adding 0 on the left.

PadLeft[list, n, x]

pads list to length n by adding x on the left.

PadLeft[list, {$n_1$, $n_2$, ...}, x]

pads list to lengths $n_1$, $n_2$ at levels 1, 2, ... respectively by adding x on the left.

PadLeft[list, n, x, m]

pads list to length n by adding x on the left and adding a margin of m on the right.

PadLeft[list, n, x, {$m_1$, $m_2$, ...}]

pads list to length n by adding x on the left and adding margins of $m_1$, $m_2$, ...
on levels 1, 2, ... on the right.

PadLeft[list]

turns the ragged list list into a regular list by adding 0 on the left.

• • PadLeft[{1, 2, 3}, 5]

• • PadLeft[x[a, b, c], 5]

• • PadLeft[{1, 2, 3}, 2]

• • PadLeft[{{}, {1, 2}, {1, 2, 3}}]

• • PadLeft[{1, 2, 3}, 10, {a, b, c}, 2]

• • PadLeft[{{1, 2, 3}}, {5, 2}, x, 1]