Unlike several other frequently used functions, the IF function does not support wildcards. However, you can use the COUNTIF or COUNTIFS functions inside the logical test of IF for basic wildcard functionality.
Here, COUNTIF counts cells that match the pattern "??-????-???", but since the range is just one cell, the answer is always 1 or zero. The question mark wildcard (?) means "one character", so COUNTIF returns the number 1 when the text consists of 11 characters with two hyphens, as described by the pattern. If cell contents do not match this pattern, COUNTIF returns zero.
When the count is 1, the IF function returns an empty string (""). When the count is zero, IF returns the text "invalid". This works because of boolean logic, where the number 1 is evaluated as TRUE and the number zero is evaluated as FALSE.
Alternative with SEARCH function
Another way to use wildcards with the IF function is to combine the SEARCH and ISNUMBER functions to create a logical test. This works because the SEARCH function supports wildcards. However, SEARCH and ISNUMBER together automatically perform a "contains-type" match, so wildcards aren't always needed. This page shows a basic example.
One limitation if the IF function is that it does not support wildcards like "?" and "*". This means you can't use IF by itself to test for text that may appear anywhere in a cell. One solution is a formula that uses the IF function together with...
In the example shown, we want to mark or "flag" records where the color is red OR green. In other words, we want to check the color in column B, and then leave a marker (x) if we find the word "red" or "green". In D6, the formula were using is: = IF...
The IF function runs a logical test and returns one value for a TRUE result, and another for a FALSE result. For example, to "pass" scores above 70: =IF(A1>70,"Pass","Fail"). More than one condition can be tested by nesting IF functions. The IF...
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