Please refer to the following screenshot. How could you enter the array shown in the screenshot? The only way is to type them in one by one. Type in 0, click the cell with zero (A1 in this case), then drag the small square at the lower left corner of the cell to cell V1. Type in 0 and 5 in cell A1 and B1, respectively. Click to choose both A1 and B1. Then drag the small square at the lower-left corner of the cell B1 to cell V1. Type in 0 and 5 in cell A1 and B1, respectively. Click to choose both A1 and B1. Then drag the small square at the lower-left corner of the cell B1 to cell V1 while holding down Ctrl