Question 1

What range of ASCII codes corresponds to printable characters?

Accepted Answer

ASCII codes 32–126 are printable characters. 32 is the space character; 33–47 are punctuation symbols; 48–57 are digits 0–9; 65–90 are uppercase A–Z; 97–122 are lowercase a–z; 33–126 covers all visible characters. Codes 0–31 and 127 are control characters (non-printable).

Question 2

What are ASCII control characters used for?

Accepted Answer

Control characters (0–31) were designed for controlling printers and terminals: 9=Tab, 10=Line Feed (newline), 13=Carriage Return, 27=Escape. Many are obsolete for their original purposes but are still used in protocols and file formats.

Question 3

Can I enter any number and get a character?

Accepted Answer

For 0–127: ASCII characters. For 128–255: extended ASCII (varies by encoding — Windows-1252\ or Latin-1). Values above 255 enter Unicode territory. This tool handles the standard ASCII range 0–127 and outputs the corresponding character or control code name.

ASCII转字符

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