Difference between revisions of "Float"

(New page: The '''Float''' datatype is a type of computing variable. It has three parts: the mantissa, the exponent, and the sign. The mantissa is the number itself. It is raised...)
 
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The '''Float''' [[datatype]] is a type of computing [[variable]]. It has three parts: the [[mantissa]], the [[exponent]], and the [[sign]].
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The '''float''' [[datatype]] is a type of computing [[variable]]. It has three parts: the [[mantissa]], the [[exponent]], and the [[sign]].
 
 
The mantissa is the number itself. It is raised to the 10^(exponent) power. The sign determines whether the number is positive or negative.
 
  
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The mantissa is the number itself; it is multiplied by <math>10\textsuperscript{exponent}</math> to get the actual number represented by this float. The sign determines whether the number is positive or negative.
  
 
== Advantages and Disadvantages with [[Fixed]] Datatype ==
 
== Advantages and Disadvantages with [[Fixed]] Datatype ==
 
Advantages:
 
Advantages:
  
Float has a significantly larger range of numbers than fixed. (123450000000 and 0.00012345 take up the same space)
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*Float has a significantly larger range of numbers than fixed. For example, 123450000000 and 0.00012345 take up the same space.
  
It is an important metric in measuring computational power (in [[FLOPS]])
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*It is an important metric in measuring computational power (in [[FLOPS]]).
  
 
Disadvantages:
 
Disadvantages:
  
Float takes up slightly larger space than Fixed to excersise its full potential
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*Float must take up a slightly larger amount of space than fixed in order to exercise its full potential.
  
Possibility of low-precision rounding
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*With floats, there is a possibility of low-precision rounding.
  
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[[Category:Datatypes]]
 
[[Category:Datatypes]]
 
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Revision as of 22:03, 12 December 2008

The float datatype is a type of computing variable. It has three parts: the mantissa, the exponent, and the sign.

The mantissa is the number itself; it is multiplied by $10\textsuperscript{exponent}$ to get the actual number represented by this float. The sign determines whether the number is positive or negative.

Advantages and Disadvantages with Fixed Datatype

Advantages:

  • Float has a significantly larger range of numbers than fixed. For example, 123450000000 and 0.00012345 take up the same space.
  • It is an important metric in measuring computational power (in FLOPS).

Disadvantages:

  • Float must take up a slightly larger amount of space than fixed in order to exercise its full potential.
  • With floats, there is a possibility of low-precision rounding.

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