# Sequence

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In this article, we will explore the Power Fx Sequence Function and how it can be used in Power Apps. We will cover the basics of the sequence function, how to use it in your app, and some examples of how it can be applied.

## What is the Power Fx Sequence Function?

The Power Fx Sequence Function is a powerful function that allows you to perform sequential operations on your data in Power Apps. It is used to execute a series of steps or operations in a specific order. The sequence function is particularly useful when working with complex data and calculations.

## How to use the Power Fx Sequence Function in Power Apps

Using the Power Fx Sequence Function in Power Apps is straightforward. The first step is to create a new app or open an existing one. Once you have done that, you can add the sequence function to your app.

1. Open the Power Apps studio and select the app you want to add the sequence function to.

2. Click on the “New Screen” button to create a new screen.

3. Click on the “Insert” tab in the right-hand side menu and select “Controls.”

4. Scroll down until you see the “Functions” section and select “Sequence.”

5. Drag and drop the sequence control onto the screen.

Once you have added the sequence control to your app, you can start using it to perform sequential operations on your data.

## Examples of using the Power Fx Sequence Function in Power Apps

Here are some examples of how the Power Fx Sequence Function can be used in Power Apps:

### Example 1: Calculating a Total

Suppose you have a list of items and you want to calculate the total cost of those items. You can use the sequence function to perform the calculation for you.

To do this, you would follow these steps:

1. Create a new screen in your app.

3. Add a label control to your screen and set its Text property to the following formula:

`Sequence( Sum( Gallery1.AllItems, Cost ), {Value: SumCost} ).Value`

This formula uses the sequence function to perform a sum operation on the Cost column of your data source. It then stores the result in a variable called SumCost.

4. Finally, set the Text property of your label control to the SumCost variable.

### Example 2: Updating a List of Items

Suppose you have a list of items and you want to update the status of those items. You can use the sequence function to perform the update for you.

To do this, you would follow these steps:

1. Create a new screen in your app.

3. Add a dropdown control to your screen and populate it with the available status options.

4. Add a button control to your screen and set its OnSelect property to the following formula:

`Sequence( Patch( Gallery1.AllItems, {Status: Dropdown1.Selected.Value} ) )`

This formula uses the sequence function to perform a patch operation on the items in your gallery control. It updates the status of each item to the selected value in the dropdown control.

5. Finally, add a label control to your screen and set its Text property to “Items Updated Successfully” to give the user feedback on the update operation.

In conclusion, the Power Fx Sequence Function is a powerful tool that can be used to perform sequential operations on data in Power Apps. It is particularly useful when working with complex data and calculations. By following the steps outlined in this article, you can easily add the sequence function to your app and start using it to perform your own operations.