Description
Evaluates one or more string expressions, dynamically, from left to right, using BigDecimal precision arithmetic to calculate the values of arbitrary precision arithmetic expressions.
Returns
An object; the result of the evaluations.
Category
Mathematical functions, Dynamic evaluation functions
Function syntax
PrecisionEvaluate(string_expression1 [, string_expression2 , ... ])
See also
Evaluate, Using Expressions and Number Signs in the Developing ColdFusion Applications
Parameters
Parameter |
Description |
|---|---|
string_expression1, string_expression2... |
Expressions to evaluate |
Usage
The PrecisionEvaluate function lets you calculate arbitrarily long decimal (BigDecimal precision) values. BigDecimal precision arithmetic accepts and generates decimal numbers of any length, and does not use exponential notation. The PrecisionEvaluate function calculates arbitrary precision results only for addition, subtraction, multiplication, and division. If you use any of the following operations, ColdFusion performs normal integer or floating point arithmetic and does not return BigDecimal values.
- exponentiation (^)
- modulus (MOD or %)
integer division
This function differs from the Evaluatefunction only in its use of BigDecimal precision arithmetic to calculate numeric values; otherwise the two functions are identical. The results of an evaluation on the left can have meaning in an expression to the right, and the function returns the result of evaluating the rightmost expression. If a string expression contains a single- or double-quotation mark, the mark must be escaped.If an expression, such as 1/3, results in an infinitely repeating decimal value, ColdFusion limits the decimal part to 20 digits.Note: To increase processing efficiency, do not put the arithmetic expressions to evaluate in quotation marks ("). ColdFusion compiles PrecisionEvaluate(a*b) more efficiently than it compiles PrecisionEvaluate("a*b"), although both formats produce the same results.
Example
<cfscript>
num1=5
num2=(3/8)
writeOutput("The resultant expression is: " & precisionEvaluate(num1/num2))
</cfscript>
Output
The resultant expression is: 13.33333333333333333333
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