Excel gives you quite a few options to choose from under Number > Date in the Format Cells dialog (which, again, you get to by pressing Ctrl-1 or Command-1 on the Mac).

Excel users wanting to display numbers as monetary values, must first format those numbers as currency. To do this, apply either the Currency or Accounting number format to the cells that you want ...

Padding Numbers In the previous example you saw that we can format numbers and force then to display a fixed number of decimal places. The 0.00 part of the custom format makes this happen. For example ...

Learn Excel 365 number formatting to create clear, professional spreadsheets. Learn essential tips and advanced techniques for data clarity ...

Instead of showing big digits in a cell, you can format numbers in thousands, millions, and billions in Excel.

Combine an Excel custom format with data validation and remove the pressure for input perfection from personnel by letting Excel do the work.