The Excel IF OR function is an extension of the IF function, also known as the IF-THEN function. Due to its many uses, it is one of the most important functions in Excel. The function can be used to evaluate a specific value to see if it matches an expected value. If the values are identical, you will receive a predefined output. If this is not the case, a different output will be triggered. First, you must define the conditions that determine whether the return value is true or false.
If you then combine the IF function with the OR function, you can define several conditions. At least one of these conditions must be met for the resulting return value in Excel to be true. If either condition A or B is true, return value C will be output. If neither are met, the function will output return value D. The formula looks like this: