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Don't give me five!

Question :

You will be given the starting and ending integers of a sequence and should return the number of integers within it which do not contain the digit 5. The start and end numbers should be included!

Examples:

1,9 → 1,2,3,4,6,7,8,9 → Result 8

4,17 → 4,6,7,8,9,10,11,12,13,14,16,17 → Result 12

50,60 → 60 → Result 1

-59,-50 → → Result 0

The result may contain five.

The start number will always be smaller than the end number. Both numbers can be also negative!

I'm very curious for your solutions and the way you solve it. Maybe someone of you will find an easy pure mathematics solution.

Edit This is a code-golf challenge, so the shortest code wins.

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If this is an answer to a challenge…

…Be sure to follow the challenge specification. However, please refrain from exploiting obvious loopholes. Answers abusing any of the standard loopholes are considered invalid. If you think a specification is unclear or underspecified, comment on the question instead.
…Try to optimize your score. For instance, answers to code-golf challenges should attempt to be as short as possible. You can always include a readable version of the code in addition to the competitive one. Explanations of your answer make it more interesting to read and are very much encouraged.
…Include a short header which indicates the language(s) of your code and its score, as defined by the challenge.

More generally…

…Please make sure to answer the question and provide sufficient detail.
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\$\begingroup\$ Isn't this PHP7.1 syntax? \$\endgroup\$

aross
– aross

2017年01月20日 10:06:44 +00:00
Commented Jan 20, 2017 at 10:06
\$\begingroup\$ @aross: It is. But PHP 7.1 is older than 5 hours (pubished on December, 1) \$\endgroup\$

Titus
– Titus

2017年01月20日 10:50:47 +00:00
Commented Jan 20, 2017 at 10:50
1

\$\begingroup\$ of course, I just asked because I'm used to specifying the version if it's 7 or up. That's also kind of the convention for Python \$\endgroup\$

aross
– aross

2017年01月20日 11:00:04 +00:00
Commented Jan 20, 2017 at 11:00
1

\$\begingroup\$ Convention for PHP - as far as I have seen - is to use the most recent version unless specified otherwise. \$\endgroup\$

Titus
– Titus

2017年01月20日 16:12:29 +00:00
Commented Jan 20, 2017 at 16:12
\$\begingroup\$ I don't think many people have the latest minor version. The least common denominator at the moment would probably be 5.5. Personally I'm using FC 25 (considered pretty cutting edge), which currently distributes PHP 7.0. If you're on Windows you probably need to update manually. \$\endgroup\$

aross
– aross

2017年01月20日 16:17:03 +00:00
Commented Jan 20, 2017 at 16:17

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