Calculator bug

[crispyking]

The square root of 10 is 3.16227766

So can you fire up the default iPhone calculator (in standard portrait mode) and enter
3.16227766 x 3.16227766
It will equal 1. It shouldn't.

Try 10 / 3.16227766
Should be 3.16227766
Now multiply that result by 3.16227766
You'll get 10.

So, why didn't the first example work?

 

[cyks]

Nice find... and confirmed on my phone as well.

It shows the right answer (9.99999999) in landscape, but consistently shows 1 in portrait.

 

[AlphaVictor87]

Well that's just weird...

but i do have to ask, what were you doing that you figured this out?

 

[charlieegan3]

Well that's just weird...

but i do have to ask, what were you doing that you figured this out?

Faking in Maths Class

 

[SomeDudeAsking]

OMG, it's CalculatorGate! Apple has some really bad bugs and should just recall iOS 6.

 

[Carlanga]

The same thing happens if you 9.99999999 * 1.1 it gives 11 in portrait and 10.999999989 in landscape.

The calculator app rounds off it there are more nines after what the screen can show. That is just rounding off coding I guess?

EDIT: I see what the TS is saying it should round off to 10 not 1, long day!

 

[crispyking]

I've never seen 9.999999 rounded up to 1 before. It's usually 10.

 

[SomeDudeAsking]

I've never seen 9.999999 rounded up to 1 before. It's usually 10.

It's the genius of Apple, they've shown how we were wrong all along. We will be seeing this gem in the Journal of Applied Mathematics tomorrow!

 

[AlphaVictor87]

The same thing happens if you 9.99999999 * 1.1 it gives 11 in portrait and 10.999999989 in landscape.

The calculator app rounds off it there are more nines after what the screen can show. That is just rounding off coding I guess, I don't see this as a defect since in landscape it has more space to be more precise.

That doesn't really make sense. It should round it to 10 then in portrait mode not 1

 

[zbarvian]

The same thing happens if you 9.99999999 * 1.1 it gives 11 in portrait and 10.999999989 in landscape.

The calculator app rounds off it there are more nines after what the screen can show. That is just rounding off coding I guess, I don't see this as a defect since in landscape it has more space to be more precise.

Well 9.99999 repeating is actually 10, I believe, so maybe it just figures it's a repeating decimal.

 

[Carlanga]

I've never seen 9.999999 rounded up to 1 before. It's usually 10.

yeah, you are right Long day for me today

 

[From A Buick 8]

The square root of 10 is 3.16227766

So can you fire up the default iPhone calculator (in standard portrait mode) and enter
3.16227766 x 3.16227766
It will equal 1. It shouldn't.

Try 10 / 3.16227766
Should be 3.16227766
Now multiply that result by 3.16227766
You'll get 10.

So, why didn't the first example work?

Did you report that to apple

 

[Sylon]

All 6 math nerds in the world are VERY upset right now!