128 (0-127), 95 printable, 33 control (for 7 bit ascii that is a through back to teletypes.)
ISO 8859-1 has 256 characters.
From 128 up to 255 we find extra symbols for other languages and regions. Ascci 128 = € for instance and 255 = ÿ.
Of course there are many 8-bit standars, windows-1250, for an example.
ASCII stands for American Standard Code for Information Interchange. It provides a means to facilitate communication on computers. It has 128 characters.
ASCII: 128; 95 printable, 33 control iso-8859-1: 256; 191 printable, 65 control unicode: many
If you're referring to kilobyte, then it contains 1024 bytes and if the characters are the standard ASCII character set where 1 character is 1 byte, then a kilobyte would have 1024 characters.
128
One can go to many places online to find charts of the American Standard Code for Information Interchange. Wikipedia has a very detailed chart of this.
It depends on which of several coding standards you use. ANSI or ASCII uses one byte to define a character, as does BCDIC and EBCDIC. Multi-byte character sets typically have a special character that is used to indicate that the following character is from a different character set than the base one. If the character u-umlaut cannot be represented in the standard set of characters, for instance, you could use two characters, one to say the following character is special, and then the special u0umlaut character. This coding standard requires somewhere between one and two bytes to encode a character. The Unicode system is intended to support all possible characters, including Hebrew, Russian / Cyrillic, Greek, Arabic, and Chinese. As you can imagine, in order to support all these different characters, you need a lot of bits. The initial standard, U16, used two bytes per character; but this proved to be insufficient, so a new standard, U24 which uses three bytes per character, is also now available.
If the characters are 8 bits then you have 4 for them in 32 bits. ASCII is an 7 bit character set but in most programming languages a char is 8 bits.
128 ascii codes.
128 ascii codes.
The letter S uses 1 byte of memory, as do all the other ASCII characters.
All ASCII character sets have exactly 128 characters, thus only 7-bits are required to represent each character as an integer in the range 0 to 127 (0x00 to 0x7F). If additional bits are available (most systems use at least an 8-bit byte), all the high-order bits must be zeroed. ANSI is similar to ASCII but uses 8-bit encodings rather than 7-bit encodings. If bit-7 (the high-order bit of an 8-bit byte) is not set (0), the 8-bit encoding typically represents one of the 128 standard ASCII character codes (0-127). If set (1), it represents a character from the extended ASCII character set (128-255). To ensure correct interpretation of the encodings, most ANSI code pages are standardised to include the standard ASCII character set, however the extended character set depends upon which ANSI code page was active during encoding and the same code page must be used during decoding. ANSI typically caters for US/UK-English characters (using ASCII) along with foreign language support, mostly European (Spanish, German, French, Italian). Languages which require more characters than can be provided by ANSI alone must use a multi-byte encoding, such as fixed-width UNICODE or variable-width UTF-8. However, these encodings are standardised such that the first 128 characters (the standard ASCII character set) have the same 7-bit representation (with all high-order bits zeroed).
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