Bits of integer

[Albert Chan]

(12-07-2022 09:48 PM)mfleming Wrote:  Just for fun, in APL

Code:

    numbits←{⍺←32 ⋄ ⌈/⍸⌽(⍺⍴2)⊤⍵}

    numbits 25
5
    64 numbits 2*32
33

Thanks for APL code. I tried this in https://tryapl.org/. (my first APL session!)

It does not work if number more than 53 bits (I think numbers is binary64)
First example, 2^54-1 just round back to 2^54 (half-way to even).

Code:

      64 numbits (2*54)-1
55
      64 numbits (2*54)-2
54