What is value of 3

It seems like your question might be missing some context, but if you are asking about the numerical value of the digit '3,' it is simply 3.

If you're asking about a mathematical expression involving the number 3, you would need to provide more information for a specific answer.

For example:

- The value of 3 in a mathematical equation such as "2 + 3" would be 5.
- The value of 3 raised to the power of 2 (3^2) would be 9.

Please provide additional details or clarify your question if you're seeking a different kind of answer.