Unity - Scripting API:

public function SetFloat(name: string, value: float): void;

Parameters

name	The name of the parameter.
value	The new value for the parameter.

Sets the value of a float parameter.

public function SetFloat(name: string, value: float, dampTime: float, deltaTime: float): void;

name	The name of the parameter.
value	The new value for the parameter.
dampTime	The time allowed to parameter to reach the value.
deltaTime	The current frame deltaTime.

Sets the value of a float parameter.

public function SetFloat(id: int, value: float): void;

id	The id of the parameter. The id is generated using Animator::StringToHash.
value	The new value for the parameter.

Sets the value of a float parameter.

public function SetFloat(id: int, value: float, dampTime: float, deltaTime: float): void;

id	The id of the parameter. The id is generated using Animator::StringToHash.
value	The new value for the parameter.
dampTime	The time allowed to parameter to reach the value.
deltaTime	The current frame deltaTime.

Sets the value of a float parameter.