What is the difference between characters 23 and x23?
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Octal 23 and Decimal 23
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Decimal 23 and Hex 23
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Octal 23 and Hex 23
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None of the above
In character escape sequences, \23 represents an octal value (base-8) while \x23 represents a hexadecimal value (base-16). Octal 23 equals decimal 19, while hex 23 equals decimal 35. This notation is common in C-style languages and string literals.
This is about numeric literal notation conventions (e.g., in C-style escape sequences or assembler/JCL numeric constants): a plain digit sequence like '23' following an escape or literal marker is interpreted in octal (base 8), while a value prefixed with 'x' (as in 'x23') is interpreted in hexadecimal (base 16). So '23' means octal 23 (decimal 19) and 'x23' means hex 23 (decimal 35) — two different bases, two different actual values, despite looking similar. The wrong options mislabel one or both bases (e.g., calling plain '23' decimal, or both octal) which doesn't match the octal-vs-hex distinction that the 'x' prefix signals.