Unused
ASCII code 144 (0x90) represents the Unused character in the extended ASCII table (128–255). It is part of the extended ASCII character set defined by the Windows-1252 (CP-1252) encoding. The extended ASCII range builds upon the original 128-character ASCII set, adding accented letters, currency symbols, typographic marks, and mathematical symbols. These characters are defined by the Windows-1252 (CP-1252) encoding, which is a superset of ISO 8859-1 (Latin-1). In modern web development, UTF-8 encoding is preferred, but understanding extended ASCII remains important for legacy system compatibility and character encoding troubleshooting.
| Decimal | 144 |
| Octal | 220 |
| Hexadecimal | 0x90 |
| Binary | 10010000 |
| HTML Code |  |
| HTML Entity | — |
| Unicode | U+0090 |
| Unicode Name | UNUSED |
| URL Escape | %90 |
| Quoted-Printable | =90 |
| UTF-8 (Hex) | C2 90 |
| Category | Extended — Miscellaneous Extended |
// Character literal
let char = '';
// Using char code
let char2 = String.fromCharCode(144);
// Unicode escape
let char3 = '\u0090'; # Character literal
char = ''
# Using chr()
char = chr(144)
# Using ord() to get code
code = ord('') # Returns 144 <!-- Direct character -->
<!-- HTML entity (numeric) -->

<!-- Hex entity -->
 // Character literal
char c = '';
// Using cast
char c2 = (char)144;
// To get code from char
int code = (int)''; // Returns 144