Alphanumeric Characters Example

Alphanumeric characters example: username, password. Rather than writing in alphabetic characters, computer programmers use numbers instead, since computers (or central processing units, if you prefer) talk to each other in machine language. 

Alphanumeric characters example: username, password
Alphanumeric characters example: username, password

Programmers do this by converting, through a numerical representation, what humans see as alphabetic characters. Most of us have seen or heard of binary coding, which uses 0s and 1s to represent an alphanumeric character. The characters 0 and 1 are used in computer programming to represent any character. As an example, the letter ‘A’ is represented as 01000001.

As a further method of encoding alphanumeric characters, computer programs use ASCII. ASCII stands for American Standard Code for Informatics Interface.

My keyboard or number pad will only let me input those numbers. ”All I see are numbers.” You’re undoubtedly thinking. And you’re absolutely right. If you want to use the ASCII code, you will need text-only software, such as Notepad (or save a Word document as plain text after choosing the text option in Word).

The ASCII table can be used by a programmer to represent the word ‘red’ using 82 69 68. In that case, it would be 114 101 100, unless they wanted it in lowercase letters, in which case it would be 114 101 10.

What are Alphanumeric characters?

A mailing address, for example, comprises alphabetic characters, numbers, and special characters (name, street, city, state, zip code). In addition to the text of this encyclopedia, every document and database also has alphabetic characters. For more information, see the alphanumeric and special characters section.

Numerous alphabetical symbols are used as well as numerical symbols

The beginnings of alphanumeric characters

Alpha(bet)+ Numeric(al)

An alphabet is made up of all the letters and numerals in a set of characters, and this term is also called alphanumeric. An Arabic numeral is one of the 10 Arabic numerals (0 to 9) in layouts intended for English-speaking users. It is composed of 26 alphabetic characters (A to Z) and 10 Arabic numbers (0 to 9).

For specific computer functions, such as naming files, alphabetic characters are strictly limited to the 26 alphabetic characters and 10 digits. However, for related applications, such as programming, other keyboard symbols are permitted.

It may be possible in some cases for upper- and lower-case letters, punctuation marks, and symbols (such as @, &, and *) to be contained within the alphanumeric character set. Among the letter variants found in languages other than English are é and ç. These are alphanumeric characters.

Alphanumeric abbreviations are made up of letters and numbers and are primarily used in text messaging. A number of additional characters can be added to alphanumeric, just as the term itself can be extended. As an example, the grawlix, which denotes extensive profanity, is mainly composed of type symbols, without any letters or numerics, yet it might nonetheless be considered an alphanumeric word.

Meaning: Alphanumeric Characters Example

When a string of alphabets and numbers is offered to humans for interpretation there are ambiguities. One of the most obvious similarities between the letters I, O, and Q is their similarity with the digits 1 and 0. Consequently, the alphanumeric subsets were chosen according to the application in order to avoid human error.

The row number and column letter were used to label seat charts and seats on passenger planes. It is possible for wide-body jets to have 10 seats that are branded ABC-DEFG-HJK. The letter I is omitted to prevent confusion with row number 1.

In-Vehicle Identification Numbers are not allowed to contain the letters I, O, or Q, as they are too similar to 1 and 0.

Each electrical connector pin has embossed lettering labelling it as V.35/M34. Deleted from the alphabet were I, O, Q, S, and Z so that 1, 0, 5, 3, and 2 would reduce eye strain. Named after the first company to adopt it, DEC Alphabet is one of the oldest alphabets in use today.

I, O, and Z are usually avoided for handwritten alphanumeric characters as they look like U and 2 in cursive, respectively, and V is often avoided because it looks like U in cursive.


6 Characters: name15

7 Characters: nameK15

8 Characters: myname15

9 Characters: mynameK15

10 Characters: myname2015

And so on…

A better question would be why a password should be generated by alphanumeric characters rather than how to generate one.

The use of such a pattern increases the domain of the character, thus increasing the search domain for brute force attacks or other password attacks, making the password computationally secure.

In the example of a six-character password, using only lowercase letters results in the attacker having to try 266, but if you use uppercase and lowercase letters, the search area expands to 526, and if numeric characters are included, the search area expands to 626, and if special characters are included even further. Because of this, password length has the same effect.

Characteristics– Features

The alphabet, also called alphanumeric, is a set of Latin and Arabic characters that represents the digits 0 through 9, the letters A through Z (in uppercase and lowercase), as well as several common symbols such as @ # * and &.

In order to create an alphanumeric password, you will need to use both letters and numbers, which will make your password more secure. We also use alphanumeric keys for building file names, although some symbols, such as a slash (/), are not recognized as part of the file name.

That doesn’t seem like a very secret organization, does it? It’s when we start talking about alphanumeric characters in the context of computer programming that the ‘secret language’ starts to reveal itself.


Some of the alphanumeric character sets may also include punctuation, symbols (such as @, &, and *), and symbols other than lower case letters. In languages other than English, letter variants such as é and ç have alphanumeric codes.


It consists of 26 letters of the English alphabet (uppercase and lowercase) and nine Arabic numbers (0-9) and is known as an alphanumeric username. There are many apps that allow users to use the underscore (_) as a character, although it is not usually permitted to use as the first character.









Unlike an ampersand or hashtag, alphanumeric passwords contain letters, numbers, and special characters. A password that contains both letters and numbers is more difficult to crack than a password that is only a series of letters. The problem is that they have a harder time being recalled and created.

Read also: Port 443 Meaning; What is Information Technology?; IT Ethics

External resource: Reference

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