Digit One 1
Symbol Meaning
The Arabic digit one belongs to the numerals which are widely spread around the planet. This positional counting system appeared in India in the 5th century or even earlier. The Arabs borrowed it from the Indians. Al-Khwarizmi wrote a book called “On the Indian Calculation,” which helped to spread the Arabic digits. Later this counting system came to Europe through Spain. Pope Sylvester II advocated for the replacement of Roman numerals with Arabic ones in the 10th century. In the 12th century, Al-Khwarizmi's book “On the Indian Calculation” was translated into Latin, which played an important role in the adoption of Arabic numerals.
The symbol “Digit One” is included in the “ASCII digits” subblock of the “Basic Latin” block and was approved as part of Unicode version 1.1 in 1993.
| Unicode Name | Digit One |
| Unicode Number | |
| HTML Code | |
| CSS Code | |
| Plane | 0: Basic Multilingual Plane |
| Unicode Block | Basic Latin |
| Unicode Subblock | ASCII digits |
| Unicode Version | 1.1 (1993) |
| Alt Code |
| Type of paired mirror bracket (bidi) | None |
| Composition Exclusion | No |
| Case change | 0031 |
| Simple case change | 0031 |
| ID_Continue | + |
| XID_Continue | + |
| Grapheme_Base | + |
| scripts | Common |
| Hex_Digit | + |
| ASCII_Hex_Digit | + |
| Encoding | hex | dec (bytes) | dec | binary |
|---|---|---|---|---|
| UTF-8 | 31 | 49 | 49 | 00110001 |
| UTF-16BE | 00 31 | 0 49 | 49 | 00000000 00110001 |
| UTF-16LE | 31 00 | 49 0 | 12544 | 00110001 00000000 |
| UTF-32BE | 00 00 00 31 | 0 0 0 49 | 49 | 00000000 00000000 00000000 00110001 |
| UTF-32LE | 31 00 00 00 | 49 0 0 0 | 822083584 | 00110001 00000000 00000000 00000000 |