# Re: [PHP] Integers

```It would also mean that 7 (8 digits which includes 0) is the highest numeric
representation that you can have or go up to in an octal representation.```
```
So to take your example and represent an octal number :

001000101111 (subscript 2) = 1057(subscript 8)

--Shreyas

On Thu, Jul 1, 2010 at 7:42 AM, Stephen <stephe...@rogers.com> wrote:

> On 10-06-30 10:02 PM, David McGlone wrote:
>
>> Hi again
>>
>> I'm trying to learn about octal numbers and I don't understand this:
>>
>> Binary: 001000101111
>> breakdown: (001)= 1 (000)= 0 (101)=5 (111)=7
>>
>> I know it's similar to unix permissions, but I'm not understanding where
>> for
>> example: 111 = 7
>>
>>
> In base 10, which you use every day, we go
> 0
> 1
> 2
> 3
> 4
> 5
> 6
> 7
> 8
> 9
> 10
>
> The number 10 is the number of distinct digits we use.
>
> In binary we only us two, 0 and 1, so 10 is 2 decimal
>
> So we go
>
> 0 = 0 decimal
> 1 = 1 << important
> 10 = 2 << important
> 11 = 3
> 100 = 4 << important
> 101 = 5
> 110 = 6
> 111 = 7
>
> So binary 111 is 4 + 2 + 1 = 7
>
> Stephen
>
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>

--
Regards,
Shreyas Agasthya
```