# Real128 Data Type

Holds signed 128-bit (16-byte) IEEE floating-point values in the range −1.189731495357231765085759326628007E+4932 to −3.362103143112093506262677817321753E−4932 for negative values and 3.362103143112093506262677817321753E−4932 to 1.189731495357231765085759326628007E+4932 for positive values.

## Instructions

The `Real128` data type provides the largest and smallest possible magnitudes for a number.
As the name implies, `Real128` is two times the size of `Real64` and four times the size of `Real32`.

`Precision`- Be aware that floating-point data types are incapable of representing many values exactly. Operations such as comparisons can produce unexpected results. See Troubleshooting Data Types for more information.
`Default value`- When you declare a variable of type
`Real128`and leave it uninitialized,, its value defaults to zero (0.0). `Trailing zeros`- The floating-point data types have no internal means of representing trailing 0 characters following the decimal point. This means that numbers such as 1.4200 and 1.42 represent the same value. If you must display trailing zeros, the number will need to be formatted.
`Type characters``Real128`has no type characters.

## Shared methods and properties

`Real128.Bits As UInt`

- Returns the number of available bits. This is always 128.
`Real128.Epsilon As Real128`

- Returns the smallest difference between two values.
`Real128.IsNaN(x As Real128) As Boolean`

- Returns true if the value of
`x`is not a number. Division by zero can cause this result. `Real128.Max As Real128`

- Returns the maximum positive value.
`Real128.Min As Real128`

- Returns the minimum positive value.

## Examples

```
Dim foo As Real128
```