# Verify Column Header

This is a pre-built action in Avo Assure. This action verifies whether a specific column is **Present** or **Not** **Present** in the grid to prevent errors by ensuring that the necessary columns are available. The result displayed will be True (column does not exist) or False (if column exist)

### Syntax

**Input:** `<Column Header Value>`

<table><thead><tr><th>Argument</th><th>Description</th><th data-hidden></th></tr></thead><tbody><tr><td>Column Header Value<br>(Required*)</td><td>Column name from the grid</td><td></td></tr></tbody></table>

**Output:** `<Dynamic Variable>(Optional)`

<figure><img src="/files/LYkWVNZVBOFzzXZDghGz" alt=""><figcaption></figcaption></figure>

**Example 1**

The **Verify Column Header** action checks if the **Date** column exists in the table. It takes the column name (**Date**) as input and returns **True** if the column **does not exist** or **False** if the column **exists**. Use a dynamic variable to display the result.

<figure><img src="/files/lTsCO6KNG9EG9quqOHN9" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/RRKlfsXIn0RxoVQWjzVE" alt=""><figcaption></figcaption></figure>

**Example 2**\
\
The **Verify Column Header** action checks if the **Year** column exists in the table. It takes the column name (**Year**) as input and returns **True** if the column **exists** or **False** if the column **does not exist**. Use a dynamic variable to display the result

<figure><img src="/files/vhPK1BzsrTIqvqTnZppu" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/irWydfl9PfdpdfmXyPei" alt=""><figcaption></figcaption></figure>


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