PlayerPrefs for simple data in Unity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is PlayerPrefs in Unity?

PlayerPrefs is a simple way to save and load small pieces of data like settings or scores between game sessions.

beginner

How do you save an integer value using PlayerPrefs?

Use PlayerPrefs.SetInt("key", value) to save an integer under a specific key.

beginner

How do you retrieve a saved float value from PlayerPrefs?

Use PlayerPrefs.GetFloat("key", defaultValue) to get the float value saved under the key. If the key doesn't exist, it returns defaultValue.

intermediate

What happens if you try to get a PlayerPrefs key that does not exist?

PlayerPrefs returns the default value you provide. If no default is given, it returns 0 for numbers or an empty string for strings.

intermediate

How do you remove a saved key from PlayerPrefs?

Use PlayerPrefs.DeleteKey("key") to remove the saved data for that key.

Which PlayerPrefs method saves a string value?

A PlayerPrefs.GetString

B PlayerPrefs.SetInt

C PlayerPrefs.DeleteKey

D PlayerPrefs.SetString

PlayerPrefs.SetString saves a string value under a key.

What does PlayerPrefs.GetInt("score", 10) return if "score" is not saved?

A 10

B Throws an error

C null

D 0

It returns the default value 10 because "score" does not exist.

How do you clear all saved PlayerPrefs data?

A PlayerPrefs.DeleteAll()

B PlayerPrefs.Clear()

C PlayerPrefs.Reset()

D PlayerPrefs.RemoveAll()

PlayerPrefs.DeleteAll() removes all saved keys and values.

Which data types can PlayerPrefs store directly?

A int, float, string

B int, bool, string

C float, bool, string

D int, float, bool

PlayerPrefs supports int, float, and string types directly.

What is a good use case for PlayerPrefs?

A Saving large game levels

B Saving complex player inventory

C Storing user settings like volume

D Managing multiplayer data

PlayerPrefs is best for small data like user settings, not large or complex data.

Explain how to save and retrieve a player's high score using PlayerPrefs.

Think about saving an integer and getting it back safely.

Describe what happens if you try to get a PlayerPrefs key that was never saved.

Consider what PlayerPrefs returns when data is missing.