Understanding the ISEVEN Formula

The ISEVEN function in Excel checks whether a number is even, returning TRUE if even and FALSE if odd. It's a number classification tool for data analysis—like separating data into alternating groups or performing different calculations based on whether a value is divisible by 2.

ISEVEN(4) evaluates the number 4 and returns TRUE because it's an even number. It takes a number argument, rounds toward zero if necessary, and tests divisibility by 2—useful for conditional formatting or when creating formulas that need to behave differently for odd versus even values.

Why Use ISEVEN?

ISEVEN enables parity checking—think alternating calculations or formatting. Its simple TRUE/FALSE determination makes it ideal for creating striped reports, handling special cases in financial calculations, or implementing algorithms that depend on whether indices or counts are odd or even.

Example with Sample Data

ISEVEN determines number parity: TRUE for 4, 0, -2, etc. (divisible by 2), FALSE for 7, -3, etc. (not divisible by 2). When used with conditional formatting, it can create alternating row colors in tables. It's an evenness checker.