Float in this form is not a command. It's a keyword used to explicitly declare an item as being that of Float data type.
FACTS:
* PlayBasic expects all Float Variables to have '#' symbol.
* 32bit Float values are single precision.
* 32bit Float values are 4 bytes wide.
* Note: Not all declaration forms in PlayBasic V1.64 accept explicit as Float declarations at this time.
Float Variable Examples:
Float Variables can be declared either explicitly or Implicitly, it's up to you. However by default when PlayBasic sees a possible variable with the "#" symbol, it will automaticaly declared it as a Float for you.
Declaration Examples
; *=----------------------------------------=*
; Implicit Float Variable Declaration.
; *=----------------------------------------=*
; By Default when PlayBasic notices a variable
; with the # postfix symbol it will
; automatically cast this variable as a
; Float for you.
MyFloatVariable# = 123.456
Print MyFloatVariable#
; *=----------------------------------------=*
; Explicit Float Variable Declaration using DIM
; *=----------------------------------------=*
; Note: Dim Does Not support the # postfix as this time
Dim MyFloatVariable As Float
; *=----------------------------------------=*
; Declaring via Declaration/EndDeclaration Blocks
; *=----------------------------------------=*
; Note Declaration lists don't suport the AS Data Type method
Declaration
; List your variables in here
MyFloatVariable1# ; Implicit
MyFloatVariable2# ; Implicit
; etc
EndDeclaration
; *=----------------------------------------=*
; Declaring Global Float Variables
; *=----------------------------------------=*
Global MyGlobalFloatVariable# ; Implicit
; or
Global MyGlobalFloatVariable# = 123.456
; *=----------------------------------------=*
; Declaring Local Float Variables
; *=----------------------------------------=*
Local MyLocalFloatVariable#
; or,
Local MyLocalFloatVariable# = 123.456
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Float User Defined Types:
Examples of defining user defined types fields As Float
; *=--------------------------------------------=*
; Declaring Float Fields in User Defined Types
; *=--------------------------------------------=*
Type MyType
MyFloatField# ; Implicit
MyFloatField2 As Float ; Explicit
EndType
; Implicit fields can be listed by using the ,
; between them
Type MyType2
MyFloatField,MyFloatField2 ; Implicit
EndType
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Float Pointer Examples:
This example shows some valid usages of Float pointers.
Pointer Declaration Example
; Declare a Float Pointer (a pointer to read/write Float values)
Dim MyPointer As Float Pointer
; Create a bank
CreateBank 1,100
; Get the address of this bank and store it in MyPointer
MyPointer=GetBankPtr(1)
; Use this pointer to write some Float values to a bank
For lp=0 To 10
*MyPointer=123.456+lp
; INcrease the pointer by 1 Float value (4 bytes)
MyPointer=MyPointer+1
Next
; Get the address of this bank and store it in MyPointer again
MyPointer=GetBankPtr(1)
; Use this pointer to read the values back
For lp=0 To 10
Print *(MyPointer+lp)
Next
; Display the Screen and wait for the user to press a key
Sync
WaitKey
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This example would output.
123.456
124.456
125.456
126.456
127.456
128.456
129.456
130.456
131.456
132.456
133.456
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