Numbering systems

​There are three main numbering systems that are in use today.

People are used to use numbers from 0 to 9. These are basic numbers, but using these basic numbers we can represent even complex numbers such as 53841.

Computers use two main numbering systems: binary, or 0 and 1 numbers, and hexadecimal numbers, these are numbers from 0 to F.

Just like with decimal system it is possible to represent large numbers, it is also possible with these numbering systems represent very high numbers.

Binary system has only two numbers. These numbers are 0 and 1. Computers use transistors and 0 represents absence of a signal and 1 represents availability of it.

Hexadecimal systems is used to group binary numbers together and go beyond just 0 and 1. Hexadecimal system has 8 bits and it is possible to represent a number as high as 255.

However, you can question me. A computer can represent numbers higher than 255. Of course they can. In order to do so more than a single byte needs to be used.

Comments

Post a Comment

Popular posts from this blog

Absolute and relative path in HTML pages

HTML documents can have relative or absolute links to other web pages. Relative links keeps a visitor on the same web site. Relative links are pointers to other web pages on the same web site. They just contain this page filename. Absolute links on other hand contain full path including protocol and domain name to access the page. Absolute links can point to the same web site or they can point to a different web site.
Read more

Errors

It is a good idea to send errors in production environment to error log. Errors may contain sensitive information. Even so errors maybe helpful to development team or to QA team, errors need to be suppressed in production environment for viewing by everyone. Errors are good way to troubleshoot an issue therefore only trusted people can have access to this information. If not a trusted person get an access to this information, this information maybe used against the company and for a personal benefit. What to do in a case when there are more servers than one? Even so it is possible to inspect the log files in a single server, however it is impossible to do so when there is more than one server is available and web traffic is redirected to a different server each time. Log aggregation is needed in this case. All of the logs will be send to a central location. Logs may contain sensitive information. Please consult your company lawyer of how long logs can be stored, because logs can be use...
Read more

goto PHP operator

goto operator will skip execution of code and continue execution of a code that follows a label to which goto operator points to. If code has many goto operators, than this code probably needs a revision. It is possible to write code that executes without goto operators.
Read more