> ## Documentation Index
> Fetch the complete documentation index at: https://nocode-docs.zeroagent.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Declare Variable

The Declare Variable block is used to define a variable within the workflow. A variable can be declared with one of five data types:

1. Text
2. Number
3. Boolean
4. List
5. Time

Each datatype has certain properties that can be used.

### Text

Stores string data allowing you to create and manage string-based variables.

![text](https://mintlify.s3-us-west-1.amazonaws.com/zeromagiclabsprivatelimited/assets/images/str-var.png)

The text datatype has the following properties that can be used.

| Operations         | Description                                      |
| ------------------ | ------------------------------------------------ |
| Set                | Declare a string or Overwrite an existing string |
| Prepend            | Add string value at start                        |
| Append             | Add string value at end                          |

### Number

Stores numerical data, representing quantities, counts, or measurements.

![number](https://mintlify.s3-us-west-1.amazonaws.com/zeromagiclabsprivatelimited/assets/images/num-var.png)

The number datatype has the following properties that can be used.

| Operations         | Description                                      |
| ------------------ | ------------------------------------------------ |
| Set                | Declare a number or Overwrite an existing number |
| Plus               | Add a value                                      |
| Minus              | Subtract a value                                 |

### Boolean

Represents true or false values, often used for making conditional decisions or indicating states.

![boolean](https://mintlify.s3-us-west-1.amazonaws.com/zeromagiclabsprivatelimited/assets/images/bool-var.png)

The boolean datatype has the following properties that can be used.

| Operations         | Description                                        |
| ------------------ | -------------------------------------------------- |
| Set                | Declare a boolean or Overwrite an existing boolean |

### List

Stores an ordered collection of items of `string` or `number` data type, ideal for managing multiple values.

![list](https://mintlify.s3-us-west-1.amazonaws.com/zeromagiclabsprivatelimited/assets/images/list-var.png)

The list datatype has the following properties that can be used.

| Operations         | Description                                    |
| ------------------ | ---------------------------------------------- |
| Set                | Declare a array or Overwrite an existing array |
| Prepend            | Add a value at start of list                   |
| Append             | Add a value at end of list                     |

### Time

Stores specific points in time (e.g., dates, timestamps) or durations (e.g., hours, minutes).

![time](https://mintlify.s3-us-west-1.amazonaws.com/zeromagiclabsprivatelimited/assets/images/time-var.png)

The time datatype has the following properties that can be used.

| Operations         | Description                                              |
| ------------------ | -------------------------------------------------------- |
| Set                | Declare a time value or Overwrite an existing time value |

<Tip>
  [Check here](/variables/environment-variables/) to learn about how to access the variables inside the workflow.
</Tip>