Frequently Asked Questions on ASCII Values

What is ASCII Value?

ASCII stands for American Standard Code for Information Interchange, A character encoding standard that assigns unique numerical values to letters, digits, punctuation marks, and other symbols....

Why do we need ASCII Value representation?

In the physical world, you would use a pen and paper to write the message, and your friend would read the text directly. However, when it comes to digital communication, computers don’t understand letters and symbols the way humans do. Instead, they process information in the form of binary code, which consists of 0s and 1s. This is where ASCII values come into play....

How Computers Use ASCII to Understand Human Text?

Suppose you want to send a text message to your friend that reads, “Hello!” When you type this message on your phone or computer, each character is converted into its corresponding ASCII value. In this case, the ASCII values for “Hello!” are 72, 101, 108, 108, 111, and 33. These numerical values are then translated into binary code, which is transmitted to your friend’s device. Upon receiving the message, their device converts the binary code back into ASCII values and finally displays the original text, “Hello!”...

The Extended ASCII Codes (character code 128-255)

The table below adheres to the Windows-1252 (CP-1252) standard, an extension of ISO 8859-1, also known as ISO Latin-1. This standard differs from IANA’s ISO-8859-1 by substituting control characters with displayable characters in the range of 128 to 159. Any characters that deviate from ISO-8859-1 are highlighted in light blue....

So what’s before 33 and beyond 126?

ASCII values before 32 (0-31) are control characters. A character code is often used in in-band signaling as a reference point in a set of characters to avoid adding additional symbols to the text. At 32, we have space, which is included as printed characters, however, it’s not wrong to say space could also serve as a control character. At 127, we have DEL (delete), which is a control character. After 127, (128-255), we have Extended ASCII characters representing mathematical and other symbols that are not represented as keys and are not used in general....

Below are the ASCII values of Control Characters (0-31, 127):

Character Character Name ASCII Code NULL Null character 00 SOH Start of header 01 STX Start of text 02 ETX End of text 03 EOT End of transmission 04 ENQ enquiry 05 ACK acknowledge 06 BEL bell 07 BS backspace 08 HT Horizontal tab 09 LF Line feed 10...

Difference Between ASCII and Unicode

ASCII Unicode ASCII bassically used to represent text in form of symbols, numbers, and character UNICODE is used to exchange, process, and store text data in any language ASCII is a character encoding standard that uses 7-bit binary numbers to represent characters UNICODE is a character encoding standard that uses 16-bit binary numbers to represent characters ASCII can only represent 128 characters. Unicode can represent over 65,000 characters from different languages and scripts....

Conclusion

To summarize, the range of ASCII values for capital letters spans from 65 to 90, while for small letters, it extends from 97 to 122. Allocated in alphabetical sequence, the values for “A” and “Z” are 65 and 90, respectively, in uppercase. Similarly, the values for “a” and “z” in lowercase are 97 and 122, respectively....

Frequently Asked Questions on ASCII Values – FAQs

What is the ASCII value of A to Z?...