How much prior knowledge of java is necessary to move on Kotlin?

I am learning java know but i wanted to move on Kotlin as profession.
so, how much prior knowledge of java is required to move on Kotlin…

The thing that is definitely required is ability to use search engines since this question is one of the most popular on this forum and in other places people discuss kotlin.

To answer actual question, there are different opinions, but general consensus is that you do not need Java knowledge at all to start writing in kotlin, but you will probably need some things when you go to advanced features.

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