What is the range of ascii code values?
The value range is 0 to 127
In terms of character encoding, ASCII code is reserved for standard symbols, numbers, English, etc., and the value range is 0 to 127, and there is also a part of it as the extended ASCII code 128 to 255
When the operating system adopts the non-ASCII encoding (e.g., Chinese character encoding), it is generally carried out with the extended ASCII code to carry out, the agreement to use the 128 ~ 255 range of the code 2 to 3 or even 4 consecutive for Chinese character encoding, (such as the national standard with two consecutive 128 ~ 255 code to indicate 1 Chinese character, respectively, area code and bit code code code; UTF-8 can be used in 3 consecutive numbers to indicate a Chinese character), the specific coding rules depends on the specific definitions, which are generally not the same.
So, when dealing with strings, if it is a signed string, the characters encountered are less than 0, which will be combined with the characters immediately following to form a Chinese character, and those greater than 0 are standard Western characters; if it is unsigned, you can determine whether it is greater than 127.
Ascii code is the character set and its encoding most widely used in computers nowadays, and it is the most widely used character set in computers, and it is encoded by the United States National The ASCII code (AmericanStandardCodeforInformationInterchange, American Standard Code for Information Interchange) developed by the American National Standards Institute (ANSI), which has been designated as an international standard by the International Organization for Standardization (ISO) and is known as the ISO646 standard. Applicable to all Latin characters alphabet, ASCII code has two forms of 7-bit code and 8-bit code.
What is the ascII value range for numbers?
Corresponding to 0-9, the range of ascII values is 30H-39H (hexadecimal).
What is the ascii code value?
ASCII is a system of computer coding based on the Latin alphabet, primarily used to display modern English and other Western European languages. It is the most common standard for exchanging information and is equivalent to the international standard ISO/IEC646.ASCII was first published in 1967 as a normative standard, and last updated in 1986, with a total of 128 characters defined to date.
In computers, all data is stored and computed using binary numbers (because computers use high and low levels to represent 1s and 0s, respectively), e.g., the 52 letters of the alphabet (including capitalization) like a, b, c, and d, as well as numbers such as 0, 1, etc. Also, some common symbols (e.g., *, #, @, etc.) are stored in computers. computer storage should also use binary numbers to represent;
And the specific use of which binary digits to indicate which symbols, of course, each person can agree on their own set (which is called coding), and everyone if you want to communicate with each other without causing confusion, then we must use the same coding rules, and so the U.S. standardization organizations have introduced the ASCII coding, the unified regulations The ASCII code was introduced by the American standardization organization to specify which binary numbers should be used to represent the symbols mentioned above
What are the ascii code values for upper and lower case letters and numbers
SCII (AmericanStandardCodeforInformationInterchange, the American Standard Code for Information Interchange) is a system of computer coding based on the Latin alphabet, primarily used to display modern English and other Western European languages. It is the most common single-byte coding system in use today, and is equivalent to the international standard ISO/IEC646.