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Expression Evaluation

Description​


ARMbasic can evaluate an expression as either an integer, string or floating point. The type of evaluation that is performed is determined by the first variable, constant or function in a statement when scanning from left to right. It is simple scan of left to right and () are ignored for determining the type of evaluation that will occur.

Example​

 

DIM SINGLEtype as SINGLE
SINGLEtype = 1/2 ' results in 0.500000
INTEGERtype = 1/2 ' results in 0
functionCall ( 0.123 + INTEGERtype) ' passes a SINGLE type to
functionCall
functionCall ( 123 + SINGLEtype ) '
passes an INTEGER to functionCall
if 1 = SINGLEtype*2 then print
"true"            ' will not print true, as the
expression is evaluated as integers
if 1.0 = SINGLEtype*2 then print
"true"         ' will print true as 1.0 is a floating point constant and the
expression is evaluated as float