0x64

0x64 is a hexadecimal literal commonly seen in computer programming. The prefix 0x indicates that the digits following are in base-16. The value 0x64 equals 6×16 + 4, which is 100 in decimal. Hex literals are often used to express memory addresses, bit patterns, or compact constants.

In ASCII and Unicode representations, the decimal value 100 corresponds to the lowercase letter 'd'. The Unicode code point U+0064 is also written in hex as 0x64. Therefore, 0x64 can serve both as a numeric value and as a byte value that encodes the character 'd' in text data.

Common usage includes initializing constants in source code, such as int x = 0x64 in languages like C, C++, Java, or JavaScript. It can also appear in contexts like hexadecimal color components, binary masks, or memory dumps where hexadecimal notation clarifies the bit-level structure.

0x64 itself carries no special meaning beyond being a hex representation of the decimal number 100; its significance is determined by the surrounding context, whether numerical, textual, or interoperable data.