How many characters can the ascii code represent?
The number of characters that can be represented by ascii code is 128 characters.
The first 128 characters are commonly used characters such as operators, letters, numbers, etc. 32 to 126 (95 in total) are characters (32sp is a space), of which 48 to 57 are the 0 to 9 ten Arabic numerals; 65 to 90 are the 26 uppercase letters of the English alphabet, 97 to 122 are the 26 lowercase letters of the English alphabet, and the rest are some punctuation marks, arithmetic symbols, and so on.
ASCII uses a specified combination of 7- or 8-bit binary numbers to represent 128 or 256 possible characters. Standard ASCII, also called base ASCII, uses 7 binary digits (the remaining 1 binary digit is 0) to represent all upper- and lower-case letters, the digits 0 through 9, punctuation marks, and special control characters used in American English.
Which 0 to 31 and 127 (a total of 33) are control characters or communication-specific characters (the rest of the displayable characters), such as the control characters: LF (Line Feed), CR (Carriage Return), FF (Page Feed), DEL (Delete), BS (Backspace), BEL (Ringing) and so on.
What is the number of characters that ascii can represent?
ASCII (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 standard for information exchange and is equivalent to the international standard ISO/IEC646. ASCII was first published as a standardized type of code in 1967 and last updated in 1986, with a total of 128 characters defined to date.
Size rules for common ASCII codes:
Numbers < uppercase letters < lowercase letters.
1. Numbers are smaller than letters. For example, “7” < “F”.
2, the number 0 is smaller than the number 9, and in increasing order from 0 to 9. Such as “3”< “8”.
3, the letter A is smaller than the letter Z, and in increasing order from A to Z. The letter “A” is smaller than the letter “Z”. For example, “A”< “Z”.
4. The same letter in upper case is smaller than the letter in lower case by 32. e.g. “A”< “a”.
The ASCII size of several common letters: “A” is 65; “a” is 97; “0” is 48.
What is the number of characters that can be represented by ascii code?
There are 256 characters in the ascii code. ascii code occupies one byte and can have 256 values from 0 to 255. The first 128 are commonly used characters such as operators, letters, numbers, etc. The last 128 are special characters that cannot be found on the keyboard. The first 128 are commonly used characters such as operators, letters, numbers, etc. that can be displayed on the keyboard, and the last 128 are special characters that cannot be found on the keyboard.
Characters. 1, 33 control characters (can not be displayed, but in the DOS mode can be displayed in some such as smiley faces, playing card suits and other 8-bit symbols). 2, 95 printable characters (that is, the keyboard of the number of letters and special symbols). 2, 95 printable characters (that is, the number of letters and special symbols). 3, 95 printable characters (that is, the keyboard).
ASCII encoding uses a 7-bit binary number to represent characters, which can represent a total of 128 characters. If the highest bit is also used for encoding, then a total of 2^8=256 characters can be represented.
The maximum number of characters that can be represented by the standard ascii code is 256, which corresponds to hexadecimal 00h-ffh. Why? This is to ask the American standardization organization ansi, on their formulation.
ascii code generally occupies a byte, there can be 0 ~ 255 a total of 256 values, they indicate that some of the characters are not visible or used for formatting output, such as backspace, the end of the string, carriage return, line feed. Specifically, you can baidu ascii, which can be selected to show the ascii code and the corresponding table of characters to look at.