How to get User info via FB Graph API

I am finding the way to get user info by using the FB Graph API.

In my app when i get my friends list it shows me 403 friends from graph API, But act开发者_StackOverflowually there are 408 friends in my fb account friends section, but when i rewuest by using Graph API it gives me 402 friends records only.

Is it possible that Graph API doesn't give accurate friends list?

Probably means that some of your friends have 'opted out' of their data being made available to any 3rd party apps.