Unity - Scripting API:

public Vector4(x: float, y: float, z: float, w: float)

public Vector4(float x, float y, float z, float w);

Parameters

Creates a new vector with given x, y, z, w components.

public Vector4(x: float, y: float, z: float)

public Vector4(float x, float y, float z);

Creates a new vector with given x, y, z components and sets w to zero.

public Vector4(x: float, y: float)

public Vector4(float x, float y);

Creates a new vector with given x, y components and sets z and w to zero.