Question

How to define a terabyte constant in C#

Answer 1

using System;

class TerabyteExample
{
    /*
        C# long is a signed 64‑bit integer.
        Maximum value: 9,223,372,036,854,775,807  (~9.22 × 10^18)

        Terabyte sizes:

            1 TiB = 2^40  = 1,099,511,627,776 bytes
            1 TB  = 10^12 = 1,000,000,000,000 bytes

        Both values fit safely inside a long.
    */

    // Binary terabyte (tebibyte), using a bit shift.
    // 1L << 40 = 2^40 bytes.
    public const long TERABYTE_TIB = 1L << 40;

    // Decimal terabyte (SI), using a readable numeric literal.
    public const long TERABYTE_TB  = 1_000_000_000_000L;

    static void Main()
    {
        Console.WriteLine($"1 TiB = {TERABYTE_TIB} bytes");
        Console.WriteLine($"1 TB  = {TERABYTE_TB} bytes");
    }
}


/*
run:

1 TiB = 1099511627776 bytes
1 TB  = 1000000000000 bytes

*/

 

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