ASCII code generally consists of three parts:
1, ASCII printing characters: numbers 32-126 are assigned to the characters could find on the keyboard, when you view or print the document will appear. NOTE: decimal 32 represents a space, representative of a decimal number 127 DELETE command. The following is the ASCII code table and the corresponding figures
2, ASCII non-printing control characters: the numbers on the table 0-31 ASCII characters assigned to a control for controlling some peripheral devices such as printers. For example, 12 represents the feed / new page features. This command instructs the printer to jump to the beginning of the next page.
3, extended ASCII printing characters: Extended ASCII characters to meet the demand for more characters. Extended ASCII include ASCII has 128 characters (numbers 0-32 shown in the following figure), it increased to 128 characters, a total of 256. Even with these additional characters, contain many languages or symbols can not be compressed to 256 characters in. Therefore, there have been a number of variants to include regional ASCII characters and symbols.
