package main
import (
"fmt"
)
/*
Go has two important features that make defining large constants easy:
1. Untyped constants:
These can grow arbitrarily large at compile time, so expressions like
1 << 50 are perfectly safe and exact.
2. Typed constants:
When assigned to a type (e.g., uint64), Go checks that the value fits.
A petabyte fits inside uint64:
1 PiB = 2^50 = 1,125,899,906,842,624 bytes
1 PB = 10^15 = 1,000,000,000,000,000 bytes
*/
// Binary petabyte (pebibyte), using a bit shift.
// 1 << 50 = 2^50 bytes.
const PetabytePiB = 1 << 50
// Decimal petabyte (SI), using a readable numeric literal.
const PetabytePB = 1_000_000_000_000_000
func main() {
fmt.Println("1 PiB =", PetabytePiB, "bytes")
fmt.Println("1 PB =", PetabytePB, "bytes")
}
/*
run:
1 PiB = 1125899906842624 bytes
1 PB = 1000000000000000 bytes
*/
