CHAPTER2 SEQUENCE PROGRAMS
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2.4 Data Used in Sequence Programs
2.4.1 BIN (Binary Code)
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2.4.1 BIN (Binary Code)
(1) Definition
Binary is a numeral system that represents numeric values using two symbols, 0 (off) and 1 (on).
Decimal notation uses the symbols 0 through 9. When the symbols for the first digit are exhausted (a
digit reaches 9), the next-higher digit (to the left) is incremented, and counting starts over at 0.
In binary notation, only the symbols 0 and 1 are used. After a digit reaches 1, an increment resets it to
0 and the next digit (to the left) is incremented. (The numeric value becomes 10, which is equal to 2 in
decimal.)
Table2.3 shows the numeric representations in BIN and DEC.
Table2.3 Numeric representations in BIN and DEC
DEC(Decimal) BIN(Binary)
0 0000
1 0001
2 0010
3 0011
4 0100
5 0101
60110
70111
8 1000
9 1001
10 1010
11 1011
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