New
#140
Just got a GSOD on the first reboot after attempting install of 17115 on my son's i7-4770K/Asrock Z97 Fatal1ty Killer build. Rebooted again, hit restart in Settings/Windows Update and it went through OK on 2nd try. Weird.
--Ed--
Just got a GSOD on the first reboot after attempting install of 17115 on my son's i7-4770K/Asrock Z97 Fatal1ty Killer build. Rebooted again, hit restart in Settings/Windows Update and it went through OK on 2nd try. Weird.
--Ed--
Some OT quickly (b'cos weirdness is interesting.. )
Source: 5 Weird Windows Bugs Easter Eggs You Have To SeeLet’s do some basic maths together. Please use your head first. Highlight the next two lines to see the respective answers.
What is the square root of four? It’s two, isn’t it?
And what do you get if you subtract two from two? Zero, right?
Now let’s do the above calculation using the Windows calculator. Type in 4, take the square root and from the result subtract 2. What do you get now?
Still there with the UWP calc ... even tried squaring the result (thinking the correct answer may be in memory but nope...)
Windows 10 S mode for schools?... Hmmm
There is nothing new in this - all computing languages have worked like this. Basically, the algorithms for calculating square roots use numerical interation to calculate a square root.
This example uses the most basic algorithm
Rx new = (X/Rx old + Rx old)/2
E.g. start with a guess like this
initial guess Rx old- 1
so this calculates Rx new as (4/1 + 1)/2 = 2.55
The Rx old becomes Rx new
(4/2.5 + 2.5)/2 = 2.05
(4/2.05 + 2.05)/2 = 2.0006 ( to 4 sig figs)
Repeat many times and eventually it converges to the lowest precision that the computer can hold for numbers, and for all numbers there will never be an exact convergence, so eventually it will be 1.9999999999999999999999...............................9 or 2.00000000000000.................................1.
Good old FORTRAN programmers knew about real number machine precision in the 60's!
I have an HP 48gx lying around somewhere, but not gonna be bothered trying it out. I know the Precision on it is infinitesimally email.