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To convert integer decimals to octal, divide the original number by the largest possible power of 8 and divide the remainders by successively smaller powers of 8 until the power is 1. The octal representation is formed by the quotients, written in the order generated by the algorithm. For example, to convert 125 10 to octal: 125 = 8 2 × 1 + 61
Each of these number systems is a positional system, but while decimal weights are powers of 10, the octal weights are powers of 8 and the hexadecimal weights are powers of 16. To convert from hexadecimal or octal to decimal, for each digit one multiplies the value of the digit by the value of its position and then adds the results. For example:
For example, you might use a prefix of 0x when converting to hex, or a suffix of <sub>8</sub> when converting to octal. From templates In wikimarkup, this module may be called with a function name n to m , e.g.:
This scheme can also be referred to as Simple Binary-Coded Decimal (SBCD) or BCD 8421, and is the most common encoding. [12] Others include the so-called "4221" and "7421" encoding – named after the weighting used for the bits – and "Excess-3". [13]
Binary is also easily converted to the octal numeral system, since octal uses a radix of 8, which is a power of two (namely, 2 3, so it takes exactly three binary digits to represent an octal digit). The correspondence between octal and binary numerals is the same as for the first eight digits of hexadecimal in the table above. Binary 000 is ...
Some three-digit octal escape sequences are too large to fit in a single byte. This results in an implementation-defined value for the resulting byte. The escape sequence \0 is a commonly used octal escape sequence, which denotes the null character, with value zero in ASCII and most encoding systems.
Type conversion (Boolean, Integer, Real, Pointer, Bit) Octal numbers and some special symbols enclosed in brackets to represent ASCII characters Input and output
The od program can display output in a variety of formats, including octal, hexadecimal, decimal, and ASCII.It is useful for visualizing data that is not in a human-readable format, like the executable code of a program, or where the primary form is ambiguous (e.g. some Latin, Greek and Cyrillic characters looking similar).