# Vector3D.X Property

## Definition

Important

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```
public:
property double X { double get(); void set(double value); };
```

`public double X { get; set; }`

`member this.X : double with get, set`

`Public Property X As Double`

#### Property Value

The X component of this Vector3D structure. The default value is `0`

.

## Examples

The following example shows how to calculate the dot product of two Vector3D structures. It also shows how to assign values to a Vector3D structure when the structure is being declared and after the structure has been declared.

```
// Calculates the Dot Product of two Vectors.
// Declaring vector1 and initializing x,y,z values
Vector3D vector1 = new Vector3D(20, 30, 40);
// Declaring vector2 without initializing x,y,z values
Vector3D vector2 = new Vector3D();
// A Double to hold the result of the operation
Double dotProduct;
// Assigning values to vector2
vector2.X = 45;
vector2.Y = 70;
vector2.Z = 80;
// Calculating the dot product of vector1 and vector2
dotProduct = Vector3D.DotProduct(vector1, vector2);
// vectorResult is equal to (6200)
```

```
' Calculates the Dot Product of two Vectors.
' Declaring vector1 and initializing x,y,z values
Dim vector1 As New Vector3D(20, 30, 40)
' Declaring vector2 without initializing x,y,z values
Dim vector2 As New Vector3D()
' A Double to hold the result of the operation
Dim dotProduct As Double
' Assigning values to vector2
vector2.X = 45
vector2.Y = 70
vector2.Z = 80
' Calculating the dot product of vector1 and vector2
dotProduct = Vector3D.DotProduct(vector1, vector2)
' vectorResult is equal to (6200)
```