how to use playerprefs in unity
SAVING
PlayerPrefs.SetInt("score",5);
PlayerPrefs.SetFloat("volume",0.6f);
PlayerPrefs.SetString("username","John Doe");
PlayerPrefs.Save();
// If you need boolean value:
bool val = true;
PlayerPrefs.SetInt("PropName", val ? 1 : 0);
PlayerPrefs.Save();
READING
int score = PlayerPrefs.GetInt("score");
float volume = PlayerPrefs.GetFloat("volume");
string player = PlayerPrefs.GetString("username");
bool val = PlayerPrefs.GetInt("PropName") == 1 ? true : false;