What does IDE do?

Answer 1

IDE stands for
INTEGRATED
DEVELOPMENT
ENVIRONMENT
It allows you to write, compile, run your code in an enviroment specifically created to make this tasks easier than using a simple editor and the command line.

Answer 2

ide is not good for health :) When i started learning programming i thought we run programs only in ide.
ofcourse ide makes it easier as it does everything for us(providing an editor+compiler+also able to run inside it). Better use an editor like notepad++ for writing the program,In command prompt Use a compiler to compile it and then run it.AND then you know what ide does.