Normally, you want to maintain numeric values in Excel, because they can be used in formulas that perform numeric calculations. However, there are situations where converting numbers to text makes sense. One example is when you want to concatenate (join) a formatted number to text. For example, "Sales last year increased by over 15%", where the number .15 has been formatted with a percent symbol. Without the TEXT function, the number formatting will be stripped. Another example is when you want to perform a lookup on numbers using wildcards, which can't be done with numeric values.
Convert with formatting
The TEXT function can be used to convert numbers to text using a given number format. In the example shown, the TEXT function is used to convert each number in column B to a text value using the formula and number shown in column F. The TEXT function accepts a number as the value argument, the number format to use as the format_text argument. The number format can include codes for dates, times, numbers, currency, percentage, and so on, as well as custom number formats. Notice the output from the TEXT function is a text value, which is left-aligned by default in Excel.
Convert without formatting
=A1&"" // convert A1 to text
With the number 100 in cell A1, the result is "100".