Do not use flux on electronic components! It is meant to be used on plumbing pipes, etc. But then, if you want to use flux, then do not let me stop you.
https://www.makerspaces.com/how-to-solder/
If you do not know how to solder electronic components, and you wish to learn, then experiment a bit first. Learn how to use a soldering iron, and make test connections before you attempt anything "serious"!
Tom
Tom, I have nothing but respect for you. You have always given sage advice and I value the contributions you've made, and continue to make to this forum. But I'm at a loss as to why you would say not to ever use flux when soldering electronics.
I've been soldering since I was a kid, and weather it's a rosin core solder, or a flux free solder with a seperate flux, in some manner flux is always involved. Even the article you linked to indicates that there is a flux core in most modern solders.
Yes, flux for copper pipes is not the same,
And should not be used on electronics. But electronics soldering flux is meant for soldering electronics. It is produced, marketed, and sold for that purpose.
Perhaps I misunderstood your post, and you simply meant to say not to use plumbing flux on electronics. But it looks like you're saying no flux at all, and with most modern solder that's just impossible.
I mean no disrespect, just trying to understand.