How to read API documentation?

Question

After learning the basics of any language the best way forward is practice to code while getting to API docs, but, the question is how to read and understand the usage from any API documentation?

Answer 1

All the documentations these days comes in very familiar style
1. Overview of all packages / libraries
2. Their dependencies
3. The functions / methods available
4. Required arguments (type/number)
5. Output type
6. Optional inputs given in [options ] format
7. Small explanation for do & don't