> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/api-reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/api-reference/api-introduction/instruction/datatype.md).

# Parameter Types

Zenlayer Cloud API 2.0 supports multiple parameter types as shown below:

## **String**

When defining a parameter of type string, an operator has a free text input element to enter a parameter value. You can specify the minimum or maximum number of characters that the operator can use.

## **Integer**

When defining a parameter of type integer, an operator has an integer input element to enter a parameter value. The integer upper limit is an unsigned 64-bit integer. The types supported by different programming languages in SDK are different. It is recommended to define the largest integer type in the programming language used, for example, `uint64` in Golang.

## **Boolean**

When defining a parameter of type Boolean, an operator has a toggle element to enter a parameter value.

## **Float**

When defining a parameter of type Float, an operator has a precision floating-point number element to enter a parameter value.

## **Double**

When defining a parameter of type Double, an operator has a double-precision floating-point number element to enter a parameter value. A Double has 2x the precision of Float.

## **Timestamp**

When defining a parameter of type Timestamp, an operator has a combined date and time element to enter a parameter value. For example, 2022-01-01T00:00:00Z.