[Gambas-user] Confusion in Data Types

[KhurramM]

I am on ubuntu 9.04, x86, 32bit, gambas 2.12. I have some confusion regarding
the following:

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PUBLIC SUB Main()

   DIM myBoolean AS Boolean
   DIM myByte AS Byte
   DIM myShort AS Short
   DIM N, myInteger AS Integer
   DIM myLong AS Long
   DIM mySingle AS Single
   DIM myFloat AS Float
   
   PRINT "RANGES"
   myByte = 255
   PRINT "Max value in Byte " & myByte
   myByte += 1   '  Wraps OK; No BUG
   PRINT "Min value in Byte " & myByte
   
   ' Short  (2-Bytes) is 16 bit; 2^16=65536; half is 32768; ie -32768 to
32767
   myShort = 32767
   PRINT "Max value in Short " & myShort
   myShort += 1   '  Wraps OK; No BUG
   PRINT "Min value in Short " & myShort
   
   ' Integer (4-Bytes) 2^bits = 2^32 = 4294967296;
(4294967296/2=2147483648); -2147483648 to 2147483647
   myInteger = 2147483647
   PRINT "Max value in Integer " & myInteger
   myInteger += 1  '  Wraps OK; No BUG
   PRINT "Min value in Integer " & myInteger
   
   ' Long (8-Bytes) 2^bits = 2^64; -9223372036854775808 to
9223372036854775807
   myLong = 9223372036854775807
   PRINT "Max value in Long " & myLong
   myLong += 1  '  Wraps OK; No BUG
   PRINT "Min value in Long " & myLong

   ' Single (4-Byte C Float) 1.2e-38 to 3.4e38 
   mySingle = 3.4e+38
   PRINT "Max value in Single " & mySingle
   mySingle += 1 '1e+36    ' Issues
   PRINT "Min value in Single " & mySingle

   ' Float (4-Byte C Double) 2.2e-308 to 1.8e308
   'myFloat = 1.8e+308  BUG: Cant hold this value
   myFloat = 1.79e+308
   PRINT "Max value in Float " & myFloat
   myFloat += 1 ' BUG: DoesNOT Wrap
   PRINT "Min value in Float " & myFloat

END

----------------------------

Program Output:

----------------------------

RANGES
Max value in Byte 255
Min value in Byte 0
Max value in Short 32767
Min value in Short -32768
Max value in Integer 2147483647
Min value in Integer -2147483648
Max value in Long 9223372036854775807
Min value in Long -9223372036854775808
Max value in Single 3.399999952144E+38
Min value in Single 3.399999952144E+38
Max value in Float 1.79E+308
Min value in Float 1E+2147483647

----------------------------

I have issue in Single and Float:
1. How to overflow the Single and Float?
2. Why does the Float not accept the highest value?

Thanks in advance. :working:
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