From the language specification:
> Numeric constants represent exact values of arbitrary precision and do not overflow.
> Numeric constants represent exact values of arbitrary precision and do not overflow.
package main
import (
"fmt"
)
const tst = 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
func main() {
fmt.Println("%v", tst)
}
> An untyped constant has a default type which is the type to which the constant is implicitly converted in contexts where a typed value is required.
The default type for a number (integer) is int. If you were to add a period in that long string of zeros, the default for floating-point is float64.