An Excel cell can hold different type of data such as a numeric value, text and a formula.
In many cases, you might work on an Excel file with data already entered, but in case if you need to enter a number, here are the steps:
Step 1. Select a cell in the worksheet (e.g., A1);
Step 2. Press the number key on the keyboard to enter a number (e.g., 2 in A1) ;
Step 3. Press Enter from the keyboard to move the cursor to the cell below;
Tip: if you want to press "Enter" key and the cursor automatically move to the cell on the right, please see here