By and In

By adverb - At, within, or to a short distance or time.

In is a synonym for by in on topic. In some cases you can use "In" instead the word "By" as a preposition or an adverb, when it comes to topics like via, of, to.

In adverb - At, within, or to a short distance or time.

By is a synonym for in in on topic. You can use "By" instead the word "In" as a preposition or an adverb, if it concerns topics such as via, of, to, with.