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How to define a terabyte constant in TypeScript

1 Answer

0 votes
/**
 * JavaScript numbers are IEEE‑754 doubles and can represent integers
 * exactly up to 2^53 - 1 (~9e15).
 *
 * Terabyte sizes:
 *
 *   1 TiB = 2^40  = 1,099,511,627,776 bytes
 *   1 TB  = 10^12 = 1,000,000,000,000 bytes
 *
 * Both values are well within the safe integer range, so `number` is ideal.
 * Avoid bitwise shifts — they only operate on 32‑bit integers.
 */

// Binary terabyte (tebibyte)
export const TERABYTE_TIB: number = 2 ** 40  // or: 1n << 40n

// Decimal terabyte (SI)
export const TERABYTE_TB: number = 1_000_000_000_000;

console.log("1 TiB =", TERABYTE_TIB, "bytes");
console.log("1 TB  =", TERABYTE_TB,  "bytes");



/*
run:

1 TiB = 1099511627776 bytes
1 TB  = 1000000000000 bytes

*/

 



answered May 3 by avibootz
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