Here's a guide for how to switch your Minecraft world from Survival to Creative Mode for Consoles, PC, and Pocket Edition.

For PC Minecraft players, the game gives you the option to select the game mode after choosing your world. In order to switch modes once inside the game, press T to bring up the chat input menu.

In Minecraft's Creative Mode, you can fly and craft from your infinite resources. In Survival Mode, you can also craft, but you'll need to earn your resources. And you can't fly, but you can die ...