This function is used to format a numerical output to a fixed number of decimal places. The values are rounded if necessary.

Consider the following case fragment:

               20 Jun 13    30 Jun 13    15 Oct 13    12 Nov 03
Ca                2.35         2.33                      2.40
Albumin           39           41           42           48

If we define a calculated value called CorrectedCa with expression

Ca – 0.02 * (Albumin – 40) formatted to 4 places

then it will have values

               20 Jun 13    30 Jun 13    15 Oct 13    02 Nov 13
CorrectedCa       2.3700       2.3100                    2.2400

Note: The syntax formatted to 1 place may also be used.