If the suggested word is not what you want, keep typing. You accept the suggestion by typing the completion key (see “ Automatic completion”, below), and the word is completed within your buffer as if you’d typed it all out. For instance, if you’re coding in JavaScript and type syn, Notepad++ can present synchronized (a JavaScript keyword) as a suggestion.

( Package build-essential is intended for building Debian packages, but includes a bare minimum C++ build chain.Notepad++ offers automatic completion of various sorts of text after you have entered an initial substring (or prefix), which can save you having to type all of a long word (and potentially save you mistyping it). Since this will include g++, gcc, libc*-dev, and make. I might go with the invocation sudo apt-get install build-essential Some of these include this requirement via package dependencies, but generally do not - you will still have to install a compiler. Note that these also require installation of a compiler (as a separate package). If you would prefer a complete IDE (instead of a very fancy editor that can be made into an IDE), see this other question and its several answers. Once you have done so, you can adapt the above to cause Notepad++ to save your source, invoke the compiler on the source, run the resulting executable (which you might eventually want to make condition on a successful build), and show you its console output. You must install another package to have a compiler. Just to be clear: There is no compiler bundled with Notepad++. The (currently) other answer here gives an example of passing the source through the g++ compiler (for C++). (I've never done it, so I cannot verify that the following currently works.) This answer over on stackoverflow gives detailed instructions to use NppExec to save the current document, and then run it through a perl interpreter. The NppExec plugin ( docs) can be made to do this.

You must install a separate compiler, then configure Notepad++ to use it. Notepad++ is not a compiler and does not contain a compiler.

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