I'm using a fixed-point math library that works with binary numbers, so values like 0x10000000000000000 are assumed to be 1.

I implemented a function that raises a given number to a given power. Raising 0x10000000000000000 to the power of 2 yields the same number:

Remix Caption

I would prefer the result to show up as 0x10000000000000000 rather than 18446744073709551616, the latter being of course the former converted to decimal. Can I make Remix display numbers as hex?

My function:

function doPow(int128 x, uint256 y) external pure returns (int128) {
    return ABDKMath64x64.pow(x, y);
  • Have you tried returning a bytes memory instead of an integer? I've tested a simple function that returns bytes and it seems to work as you want, but I'm not sure since you're working with binary numbers. To clarify, I'm using abi.encodePacked.
    – alberto
    Commented Mar 17, 2021 at 12:08
  • 1
    Thanks, Alberto! I added an answer based on your suggestion. Commented Mar 17, 2021 at 12:19
  • I just discovered this number converter tool developed ABDK, the same guys who developed the ABDKMath64x64 library. Commented Mar 22, 2021 at 13:20

1 Answer 1


Based on @alberto's suggestion in the comment, I changed the return type from int128 to bytes memory and re-wrote my function like this:

function doPow(int128 x, uint256 y) external pure returns (bytes memory) {
    int128 result = ABDKMath64x64.pow(x, y);
    bytes memory encodedResult = abi.encodePacked(result);
    return encodedResult;

Now the result shows up like this:

Remix Caption

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