Summary

ISEVEN returns TRUE when a number is even and FALSE when it is not. It is a small function, but it is handy in layouts, conditional formatting, and simple grouping rules.

One behavior matters more than anything else here: if you give it a decimal, Excel truncates the decimal part before checking. So 10.9 is treated as 10.

Syntax

=ISEVEN(number)

You can use a number, a formula, or a cell reference.

Arguments

• number - [required] The value you want to test for even parity.

ISEVEN vs Other Functions

Using ISEVEN

This function shows up a lot in formatting rules. A classic pattern is =ISEVEN(ROW()), which lets you shade even rows differently from odd ones.

It is also useful in simple splitting rules. If an ID, cycle number, or batch number should go down one path when it is even and another path when it is odd, ISEVEN keeps that logic easy to read.

Example 1 - Check even row numbers

This is the common zebra-striping pattern.

=ISEVEN(ROW())

Example 2 - See the truncation rule

Decimals are truncated before the parity check happens.

=ISEVEN(10.9) // Returns TRUE because Excel checks 10.

Example 3 - Check negative and zero values

Parity still works normally for zero and negative integers.

=ISEVEN(-2) // Returns TRUE.

Example 4 - Use it for grouping

This keeps a split rule readable.

=IF(ISEVEN(B1),"Batch A","Batch B")

Conclusion Recap

• Main job: ISEVEN checks whether a number is even.
• Decimal rule: Excel truncates before checking.
• Good uses: Alternating rows, simple grouping, and cycle checks.
• Works with: Zero and negative even numbers too.