go - Is there a builtin func named "int32"? -



go - Is there a builtin func named "int32"? -

the below snippet works fine. in case, "int32" is? func? know there type named "int32" stupid question. i've finished a tour of go not find answer.(it's possible i'm missing something.)

package main import "fmt" func main() { var number = int32(5) fmt.println(number) //5 }

it type conversion, required numeric types.

conversions required when different numeric types mixed in look or assignment. instance, int32 , int not same type though may have same size on particular architecture.

since variable declaration, need specify type of '5'. option, mentioned rightfold in the comments is: var number int32 = 5

(as opposed short variable declaration number := 5)

see go faq:

the convenience of automatic conversion between numeric types in c outweighed confusion causes. when look unsigned? how big value? overflow? result portable, independent of machine on executes?

it complicates compiler; “the usual arithmetic conversions” not easy implement , inconsistent across architectures.

for reasons of portability, decided create things clear , straightforward @ cost of explicit conversions in code. definition of constants in go—arbitrary precision values free of signedness , size annotations—ameliorates matters considerably, though.

a related detail that, unlike in c, int , int64 distinct types if int 64-bit type. the int type generic; if care how many bits integer holds, go encourages explicit.

go

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