Bits of integer

[Albert Chan]

(12-05-2022 02:55 PM)J-F Garnier Wrote:  On the 71B or 75C w/ Math ROM, you can do:
DEF FNB(X)=LEN(BSTR$(X,2))
but I find it quite inelegant to resort to string conversion.

>10 DEF FNB(X)=LEN(BSTR$(X,2))
>X = 2^39
>X
549755813888
>FNB(X-1), FNB(X)
 39      40

>Y$ = BSTR$(X,2)
ERR:String Ovfl

FNB(x) work, but intermediate values cannot be stored.
Will the "overflowed" intermediate wreck havoc ?