1
1
Fork 0
mirror of https://github.com/QB64-Phoenix-Edition/QB64pe.git synced 2024-07-05 21:40:25 +00:00
QB64-PE/internal/help/_FLOAT.txt

28 lines
1.2 KiB
Plaintext

'''_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 {{KW|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 'only' goes up to 1.7976E+308.
* Floating decimal point numerical values cannot be {{KW|_UNSIGNED}}!
* Values can be converted to 32 byte [[ASCII]] strings using [[_MK$]] and back with [[_CV]].
* '''When a variable has not been assigned or has no type suffix, the value defaults to [[SINGLE]].'''
{{PageSeeAlso}}
* [[DOUBLE]], [[SINGLE]]
* [[_MK$]], [[_CV]]
* [[_DEFINE]], [[DIM]]
* [[PDS(7.1) Procedures#CURRENCY|CURRENCY]]
* [[Variable Types]]
{{PageNavigation}}