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Add note on BigInteger bin/hex formatting of positive values #46473

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merged 5 commits into from
Jun 27, 2025

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SolalPirelli
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@SolalPirelli SolalPirelli commented May 29, 2025

Summary

Fixes dotnet/runtime#115618.

It's somewhat unexpected that "print 3 with 2 binary digits" returns a string of length 3 ("011"), but also makes sense given the round-trip requirement and the historical context of not using - for negative bin/hex numbers.

I think documenting this behavior would be useful.


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docs/standard/base-types/parsing-numeric.md Parsing numeric strings in .NET
docs/standard/base-types/standard-numeric-format-strings.md Standard numeric format strings

See dotnet/runtime#115618.

It's somewhat unexpected that "print `3` with 2 binary digits" returns a string of length 3 (`"011"`), but also makes sense given the round-trip requirement and the historical context of not using `-` for negative bin/hex numbers.

I think documenting this behavior would be useful.
@SolalPirelli SolalPirelli requested review from adegeo and a team as code owners May 29, 2025 07:51
@dotnetrepoman dotnetrepoman bot added this to the May 2025 milestone May 29, 2025
@dotnet-policy-service dotnet-policy-service bot added dotnet-fundamentals/svc community-contribution Indicates PR is created by someone from the .NET community. labels May 29, 2025
@gewarren gewarren requested a review from tannergooding May 29, 2025 15:29
@SolalPirelli
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@dotnet-policy-service agree

@adegeo adegeo enabled auto-merge (squash) June 27, 2025 23:28
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Sorry this took so long to get to. Thank you for your efforts here!

@adegeo adegeo merged commit e491291 into dotnet:main Jun 27, 2025
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BigInteger.ToString always has a leading zero in bin and hex
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