Table

Table[expr, n] generates a list of n copies of expr.

Table[expr, {i, imax}] generates a list of the values of expr when i runs from 1 to imax.

Table[expr, {i, imin, imax}] starts with i=imin.

Table[expr, {i, imin, imax, di}] uses steps di.

Examples

Generate a list of squares:

Table[i^2, {i, 5}]
(* {1, 4, 9, 16, 25} *)

Create a multiplication table:

Table[i*j, {i, 3}, {j, 3}]
(* {{1, 2, 3}, {2, 4, 6}, {3, 6, 9}} *)

Please visit the official Wolfram Language Reference for more details.