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In recreational mathematics, a Keith number or repfigit number (short for repetitive Fibonacci-like digit) is a natural number in a given number base with digits such that when a sequence is created such that the first terms are the digits of and each subsequent term is the sum of the previous terms, is part of the sequence.
In computer science, an integer literal is a kind of literal for an integer whose value is directly represented in source code.For example, in the assignment statement x = 1, the string 1 is an integer literal indicating the value 1, while in the statement x = 0x10 the string 0x10 is an integer literal indicating the value 16, which is represented by 10 in hexadecimal (indicated by the 0x prefix).
The only Dudeney numbers are the single-digit numbers in base ... 15, 23, 24: 3213, 10055, 23343, 30544 ... numbers and cycles in Python.
A perfect digit-to-digit invariant is a sociable digit-to-digit invariant with =. An amicable digit-to-digit invariant is a sociable digit-to-digit invariant with k = 2 {\displaystyle k=2} . All natural numbers n {\displaystyle n} are preperiodic points for F b {\displaystyle F_{b}} , regardless of the base.
The 1620 was a decimal-digit machine which used discrete transistors, yet it had hardware (that used lookup tables) to perform integer arithmetic on digit strings of a length that could be from two to whatever memory was available. For floating-point arithmetic, the mantissa was restricted to a hundred digits or fewer, and the exponent was ...
Credit card numbers are either 15 or 16 digits, with each digit having its own meaning and purpose. Keeping your credit card number safe can help prevent fraudulent purchases and the stress they ...
Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})
A digit (in a given position in the number) that is lower than its corresponding threshold value means that it is the most-significant digit, hence in the string this is the end of the number, and the next symbol (if present) is the least-significant digit of the next number.