OR function
This article describes the formula syntax and usage of the OR function in Microsoft Excel. Use the OR function, one of the logical functions, to return a TRUE if any argument is TRUE; returns FALSE if all arguments are FALSE.
Syntax
OR(logical1, [logical2], ...)
The OR function syntax has the following arguments:

Logical1, logical2, ... Logical1 is required, subsequent logical values are optional. 1 to 255 conditions you want to test that can be either TRUE or FALSE.
Remarks

The arguments must evaluate to logical values such as TRUE or FALSE, or in arrays or references that contain logical values.

If an array or reference argument contains text or empty cells, those values are ignored.

If the specified range contains no logical values, OR returns the #VALUE! error value.

You can use an OR array formula to see if a value occurs in an array. To enter an array formula, press CTRL+SHIFT+ENTER.
Example
Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.
Formula 
Description 
Result 
=OR(TRUE) 
One argument is TRUE 
TRUE 
=OR(1+1=1,2+2=5) 
All arguments evaluate to FALSE 
FALSE 
=OR(TRUE,FALSE,TRUE) 
At least one argument is TRUE 
TRUE 
=IF(OR(1+1=1,2+2=5,5+5=10),"answer if true","answer if false") 
One of the OR arguments are true 
answer if true 
Related functions and examples

Read an Overview of formulas. You'll learn all about the bits and pieces that make them up.

Learn now to Use nested functions in a formula.

Excel has additional functions that can be used to analyze your data based on a condition. For example, to count the number of occurrences of a string of text or a number within a range of cells, use the COUNTIF or the COUNTIFS worksheet functions.
To calculate a sum based on a string of text or a number within a range, use the SUMIF or the SUMIFS worksheet functions.

See a video on how to use the IF function.

Common functions used with the OR function include the IF function, AND function, and NOT function.