Does analog signal allow alphanumeric values or data?
Answers
Answer:Numeric Code
Do you want to learn a secret language? If you do, see if you can decipher this string of numbers. (Look for the answer in the lesson summary.)
83 84 85 68 89 46 67 79 77
Okay, so it isn't really a secret language. It is the numeric code that computer programmers (and you) can use to create alphanumeric characters in programming. Let's investigate shall we?
Alphanumeric Defined
Alphanumeric, also known as alphameric, simply refers to the type of Latin and Arabic characters representing the numbers 0 - 9, the letters A - Z (both uppercase and lowercase), and some common symbols such as @ # * and &.
Sites requesting that you create an alphanumeric password are asking us to use a combination of numbers and letters, which creates stronger passwords. We also use alphanumeric keys to create file names, although there are some symbols that are not accepted as part of a file name, such as a slash (/).
That doesn't seem very secret does it? The 'secret' language part comes into play when we start talking about alphanumeric characters in terms of actual computer programming.
Alphanumeric Characters
Since computers (or central processing units, to be specific) use machine language in the form of numbers to communicate, computer programmers need to write their instructions using numbers rather than alphabet characters. To do this, programmers use numeric representations of what humans see as alphabet characters. You've probably seen or heard of binary code which uses only 0s and 1s to represent an alphanumeric character. Computer programmers can use a series of 0s and 1s to represent any character they wish. For example, in binary, the letter 'A' would be written as 01000001.
Another way computer programmers represent alphanumeric characters is to use ASCII. ASCII stands for American Standard Code for Information Interchange.
Partial ASCII Table
there is a diagram for you also:
