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<< Click to Display Table of Contents >> Navigation: Explain™ Control Language > Explain™ fundamentals > Mixed-mode operation |
There may be cases in which you need to perform operations with data of different types. In Explain™ it is legal to perform mixed-mode comparisons and arithmetic operations that involve both a REAL and an INDEX quantity. In all mixed-mode operations, the INDEX is automatically "promoted" to a REAL prior to the operation.
•REAL Sum INDEX becomes REAL (1.2 + 2 is evaluated to 3.2)
•REAL Mult INDEX becomes REAL (1.2 / 2 is evaluated to 0.6)
•REAL Equality INDEX becomes BOOL (1.01 eq 1 is evaluated to FALSE)
•REAL Comparison INDEX becomes BOOL (1.01 gt 1 is evaluated to TRUE)
Other mixed-mode operations are not recommended.
The Explain™ library includes some data-type cast functions that allow you to force conversion of one data type into another. Examples include the Round() and Index() functions.