static function GetFloat(key: string, defaultValue: float = 0.0F): float;
static float GetFloat(string key, float defaultValue = 0.0F);
static def GetFloat(key as string, defaultValue as float = 0.0F) as float

Returns the value corresponding to key in the preference file if it exists.

If it doesn't exist, it will return defaultValue.
	print (PlayerPrefs.GetFloat("Player Score"));
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        print(PlayerPrefs.GetFloat("Player Score"));
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		print(PlayerPrefs.GetFloat('Player Score'))