FLOAT: Difference between revisions

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* [[_FLOAT]] variables can also use the ## variable name type suffix.
* [[_FLOAT]] variables can also use the ## variable name type suffix.
* Values returned may be expressed using exponential or [[scientific notation]] using '''E''' for SINGLE or '''D''' for DOUBLE precision.
* Values returned may be expressed using exponential or [[scientific notation]] using '''E''' for SINGLE or '''D''' for DOUBLE precision.
* According to [http://babbage.cs.qc.edu/courses/cs341/IEEE-754references.html IEEE-754] this can store a value of up to 1.1897E+4932 compared to a DOUBLE which goes up to 1.7976E+308.
* Floating decimal point numerical values cannot be [[_UNSIGNED]].
* Floating decimal point numerical values cannot be [[_UNSIGNED]].
* Values can be converted to 32 byte [[ASCII]] strings using [[_MK$]] and back with [[_CV]].
* Values can be converted to 32 byte [[ASCII]] strings using [[_MK$]] and back with [[_CV]].
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* [[_MK$]], [[_CV]]
* [[_MK$]], [[_CV]]
* [[_DEFINE]], [[DIM]]
* [[_DEFINE]], [[DIM]]
* [[PDS (7.1) Procedures#CURRENCY|CURRENCY]]
* [[PDS(7.1) Procedures#CURRENCY|CURRENCY]]
* [[Variable Types]]
* [[Variable Types]]




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Latest revision as of 13:57, 20 November 2024

_FLOAT numerical values offer the maximum floating-point decimal precision available using QB64.


Syntax

DIM variable AS _FLOAT


Description

  • QB64 always allocates 32 bytes to store this value.
  • It is safe to assume this value is at least as precise as DOUBLE.
  • Under the current implementation it is stored in a 10-byte floating point variable.
  • _FLOAT variables can also use the ## variable name type suffix.
  • Values returned may be expressed using exponential or scientific notation using E for SINGLE or D for DOUBLE precision.
  • Floating decimal point numerical values cannot be _UNSIGNED.
  • Values can be converted to 32 byte ASCII strings using _MK$ and back with _CV.
  • When a variable has not been assigned or has no type suffix, the value defaults to SINGLE.


See also



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