# How to Highlight Odd Number and Even Number by Conditional Format in Excel?

Suppose we have a table of numbers, and we want to highlight odd number and even number by different format settings to distinguish them, in this situation we need to know how to identify odd number and even number. Besides, we need to know how to highlight them by different formats. Actually, excel has a lot of strong functions, user can highlight odd and even number with different formats by Conditional Format function properly. This article will show you the method to** identify odd and even number**, and the method to highlight them.

**Part 1. How to Identify Odd and Even Number in Excel**

See below table, odd numbers and even numbers exist. We can use ISODD and ISEVEN functions to identify them. See details below.

**Step 1:** Insert a new column next to column A. Then in B1, enter the formula **=ISODD(A1)**.

**Step 2:** Click **Enter**. Verify that True is displayed in B1 properly. That means A1 value is an odd number.

**Step 3:** Drag the fill handler to fill cells B1:B5.

**Step 4:** Select column B, right click and select **Copy**, then select column D, right click and **select Insert Copied Cells**.

**Step 5:** Then column B with formula will be pasted in D column, True or False value is displayed based on value in column C.

**Step 6:** Repeat above step on other columns. Then you can do filter on column B, D etc. to filter odd number or even number and mark them with different colors.

**Comment:**

- You can also use ISEVEN function in above steps. This time if value is even number, formula will return True.

**Part 2. How to Highlight Odd and Even Number by Conditional Format in Excel**

We can identify odd and even number by above method, though we can do filter on each column and then mark them with different colors, the operation is complex and troublesome. So we need a quick and convenient way to highlight them directly.

We still use previous table to do demonstration.

**Step 1:** First, select the range you want to do filter. In this case select A1:E5.

**Step 2:** In ribbon, click **Home->Conditional Formatting** under **Styles**.

**Step 3:** Click the arrow button on **Conditional Formatting** icon to load all sub menus, select **New Rule** in it.

**Step 4:** In the pops up **New Formatting Rule** window, in **Select a Rule Type** panel, select **Use a formula to determine which cells to format**.

**Step 5:** In **Edit the Rule Description** panel, in **Format values where this formula is true** textbox, enter the formula **=ISODD(A1).**

**Step 6:** After entering the formula, click **Format** button to specify your cell format for highlighted cells. You can design the format by your demands. In this case, we just mark them with light blue background in cells. In **Format Cells**, click **Fill**, select Background Color, then click **OK**.

**Step 7:** Returns to **New Formatting Rule** window, see the **Preview**. Verify that cell is filled with light blue background. Then click **OK**.

**Step 8: **Verify that all odd numbers are marked with light blue.

**Step 9: **Repeat above steps, set **Format values where this formula is true =ISEVEN(A1),** then you can also highlight even numbers with other color.