SELECT PRECISION

General Forms:

1. SELECT PRECISION numeric_expression

2. alpha_receiver = SELECT PRECISION

KCML represents numbers internally in a form of binary notation. This leads to fast arithmetic, but could lead to problems with comparison. For example `1.23456' might be represented internally as `1.2345999999999', therefore the statement `1.23456 * 100000 = 123456' could be false.

In order to overcome this problem, any two numbers that are `sufficiently close' are considered to be equal. The PRECISION select parameter defines `sufficiently close' to mean two numbers differing by less than the specified numeric expression. By default the precision is `1E-10'.

The PRECISION select parameter can also be used as a function returning the current precision value.

Example:

SELECT PRECISION 1E-8
IF 1 = 1 + 1E-9 THEN PRINT "True"

Output:

True

Syntax examples:

SELECT PRECISION 1E-5
SELECT PRECISION precision(value)
SELECT LIST /005, PRECISION precision(value)
prec$ = SELECT PRECISION
PRINT "Current precision is : "; SELECT PRECISION