Hi John, My experience is that NUMBER in DataWindow buffer behaves like DOUBLE (15-16 digits precision). It may differ but I highly doubt there is much difference. This has consequences >>>

• Number datatype in DataWindow buffer loses precision at approx 15 digits because it handles Double.
• Precision of Double = ~ 52 bits = 15-16 digits.
• Max LongLong value = 63 bits = 19 digits.
• Max precision of Decimal = 28 digits.

I recommend:

1. Use decimal when data is "decimal" in nature (ex: US or EU GDP)
2. Use decimal when data is integer value of 48+ bits.
3. PowerScript :: Copy LongLong value to Decimal{0} variable before doing arithmetic.
   I experienced PowerScript implicitly promote LongLong value to Double despite what PB docs state.

HTH /Michael

Hi John;

  The DW "number" data type can be either Decimal, Double, Integer, Long or Real. The numeric range for each of those is documented under the "Standard" data types in the PB help.

Regards ... Chris