BUILT-IN MATHEMATICA SYMBOL

Insert

Insert[list, elem, n]
inserts elem at position n in list. If n is negative, the position is counted from the end.

Insert[expr, elem, {i, j, ...}]
inserts elem at position in expr.

Insert[expr, elem, {{i₁, j₁, ...}, {i₂, j₂, ...}, ...}]
inserts elem at several positions.

Details Details

list can have any head, not necessarily List.
Insert works on SparseArray objects by effectively inserting into the corresponding ordinary lists.

Insert to be at position :

Out[1]=

Insert to be at position 2 from the end:

Out[1]=

Insert at several positions:

Out[1]=

Insert into a 2D array:

Out[1]=

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