A very basic introduction to what is an IDE. Integrated Development Environment,

An IDE is basically a type of editor that helps programmers develop programs in their chosen computer language.

IDE may help with a number of aids including, but not limited to, highlighting sections of code, error tracking, step into or over areas of code, syntax checking, watch variables change over time as if the code is running and testing and debugging, etc...

IDE. Integrated Development Environment and Programming Editors:-
http://www.acomputerportal.com/integrated_development_environment.html