Error handling while assigning a variable

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1

I have simple go program where i assign a value to variable like
var sum uint8 = -20
In this code error will be there. Is there any way i can handle that error ?

2

which kind of error you are talking about ?

3

like value overflow error

4 
var sum int8 = -20

https://golang.org/ref/spec#Numeric_types

5

@luk4z7, Appreciate you help i just gave an example with value overflow.
I wanted to know how to handle unknown exceptions that might occur during runtime.

6

OK, so, I think that you can try the recover, check this

https://medium.com/technofunnel/error-handling-in-golang-with-panic-defer-and-recover-d77db7ae3875
https://go.dev/blog/defer-panic-and-recover

7

There is run time and compile time errors, you can only recover run time panic errors.

8

This isn’t exactly what you asked about, but if you want to detect overflows:

  • For smaller integer types like (u)int8, 16 and 32, a common method is to perform the arithmetic in the next largest integer size (e.g. use int16 to calculate addition of two int8s) and check if the result is greater or less than the smaller type’s max/min.

  • For the largest Go integer data type: uint64, you can use the Add64 function from the math/bits package which returns a carryOut parameter with the resulting overflow.