Monday, December 29, 2008

Microsoft Excel 2007 Number Formats

By Lynne Kramer

When entering numbers into a spreadsheet, you sometimes need to ensure that the number format is consistent. For example, if the numbers in question represent prices, you may want to display a currency symbol or you may simply want to make sure that the number of decimals displayed is consistent..

Unless the user specifies otherwise, all numbers in Excel are rendered in the "General" format. What this means is that numbers are displayed exactly as one enters them: if you enter two decimals, two decimals are displayed; if you went to one decimal, one decimal is displayed; and so forth.

To specify the number format, the best idea is usually to select the entire column. To do this, simply click on the letter or letters representing the column. (If text is contained in the selection, it will not be affected by the number format you specify.)

Number formats are found in the "Numbers" section of the Home Tab of the Excel Ribbon. There are three principal formats related to numbers: the first is "Number", the second "Currency" and the third "Accounting". To access the full range of number formats, choose "More Number Formats" from the "Numbers" drop-down menu. Another method of accessing the same dialog box is to click on the launch button in the "Numbers" group of the Home Tab.

When you click on one of the number formats on the left of the "Numbers" dialogue box, you are given a series of choices which enable you to refine the way that the format will work. Thus, if your numbers refer to an hourly rate, you would click the "Number" category in the left column and then specify two decimal places. The option to "Use Thousands Separator" will add the appropriate separator to demarcate thousands. The separator used will depend on your locality: for example, in the UK or USA, a comma will be used; in European countries, a dot will be used.

The final option in the "Number" category controls the display of negative numbers. The default is to display a minus sign in front of the number and leave the colour of the number unchanged. However, you can also dispense with the minus sign and change the colour of negative numbers to red; or you can both change the colour of negative numbers to red and display the minus sign.

When you click on the "Currency" category, you have pretty much the same choices with the addition of a currency symbol. One can specify which currency symbol is used or one can dispense with the currency symbol altogether.

The "Accounting" number format is almost identical to "Currency". Here again, we can choose our currency symbol. However, there are no choices relating to negative numbers. This is because the convention in accountancy is to put negative numbers in brackets.

In addition to using the number dialog box, you'll notice that there are a series of handy buttons which can apply each of the appropriate formats with one click. There are also two buttons for increasing and decreasing the number of decimals displayed in the selected numbers.

Finally, there will be times where you enter a number into a cell but do not want Excel to regard it as a number. For example, if you have a column of data with an ID of some sort, although the ID may be numeric, you may not want Excel to see it as a number or to change it in any way. You will probably want the ID to simply stay exactly as it was entered. In this scenario, it's best to format the number as "Text". The easiest way of doing this is to highlight the appropriate column and in the number dialog box select the "Text" category. - 15485

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