7.61
7.622
6.733
7.346
8.4
7.028
6.9
6.626
5.4
6.2
5.404
6.063
7.42
8.474
6.697
Real data type GudangMovies21 Rebahinxxi LK21
A real data type is a data type used in a computer program to represent an approximation of a real number. Because the real numbers are not countable, computers cannot represent them exactly using a finite amount of information. Most often, a computer will use a rational approximation to a real number.
Rational numbers
The most general data type for a rational number (a number that can be expressed as a fraction) stores the numerator and the denominator as integers. For example 1/3, which can be calculated to any desired precision. Rational number are used, for example, in Interpress from Xerox Corporation.
Fixed-point numbers
A fixed-point data type uses the same, implied, denominator for all numbers. The denominator is usually a power of two. For example, in a hypothetical fixed-point system that uses the denominator 65,536 (216), the hexadecimal number 0x12345678 (0x1234.5678 with sixteen fractional bits to the right of the assumed radix point) means 0x12345678/65536 or 305419896/65536, 4660 + the fractional value 22136/65536, or about 4660.33777. An integer is a fixed-point number with a fractional part of zero.
Floating-point numbers
A floating-point data type is a compromise between the flexibility of a general rational number data type and the speed of fixed-point arithmetic. It uses some of the bits in the data type to specify an exponent for the denominator, today usually power of two although both ten and sixteen have been used.
Decimal numbers
The decimal type is similar to fixed-point or floating-point data type, but with a denominator that is a power of 10 instead of a power of 2.
See also
Binary number
Decimal number
Hexadecimal number
IEEE Standard for Floating-Point Arithmetic
References
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