QB64-PE/internal/help/_FLOAT.txt

{{DISPLAYTITLE:_FLOAT}}
'''_FLOAT''' numerical values offer the maximum floating-point decimal precision available using '''QB64'''.


{{PageSyntax}} 
::[[DIM]] {{Parameter|variable}} AS [[_FLOAT]]


{{PageDescription}}
* '''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.
* 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]].
* 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]].'''
* Note: OpenGL's [[_GL_FLOAT]] constant is a [[SINGLE]] (4 byte) floating point number, while a native QB64 _FLOAT is a 10-byte floating point number.


{{PageSeeAlso}}
* [[DOUBLE]], [[SINGLE]]
* [[_MK$]], [[_CV]]
* [[_DEFINE]], [[DIM]]
* [[PDS (7.1) Procedures#CURRENCY|CURRENCY]]
* [[Variable Types]]


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