Identification

There are several conventions for expressing that a number is represented as hex.

* A decimal subscript can give the base explicitly. For example 159₁₀ indicates decimal 159, 159₁₆ indicates hex 159. Some prefer a text subscript, such as 159_decimal and 159_hex, or 159_d and 159_h

* In C and many languages influenced by it, the prefix 0x indicates that the numeric literal after it is in hex, a character of a string or character

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