It depends which difficulty setting you've got it on. If you're playing on peaceful, you're more or less free to mine and build in relative safely, there are no hostile mobs, your hunger doesn't decrease. You can still die from falling, drowning, lava, etc.
Playing on Easy or Normal will mean there are hostile mobs, but you can't starve to death (though there are still negative effects from hunger).
On Hard, enemies do more damage, and you can starve to death.
Chat with our AI personalities
To fly in survival mode you need to craft the eye of ender
#$# $#$ #$# # = Gunpowder $ = Sand
no unfortunatley, there is currently only survival and creative but hopefully they will add this addition in the feature
It is the same as survival, but the game is locked at the hardest difficulty, and you only have one life. When you die, you have to delete the world.
It's the default mode of minecraft, you need to collect your own resources and hunt animals to get food to feed yourself.