How to convert int (int64) into uint16 in golang?

Question

I can 100% guaranty the value of input int variable is always unsign(positive) and less than int16.

How can I convert this int type variable to uint16?

Answer 1

// convert the type and assign to new variable or pass as a parameter. 
var i int
...
u := uint16(i)
foo(uint16(i))

Answer 2

You need to check that the number is not negative and that it is <= 0xFFFF and then cast it to an unsigned 16 bit int.