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Note that if you want to assign a string value (as in the last example) then the characters must be enclosed in either single 'Hello' or double "Hello" quotes.
Parameter Types
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When writing expressions it is important to consider the type of the result. For example, if you have written a Stream Attribute expression to return the integer 3 but have defined the type of the Stream Attribute to be a String then PhixFlow will stop and report the error when the expression is evaluated. The full list of types handled by PhixFlow is shown below. It's not necessary to understand the meaning of the individual types at this stage, however just be aware that the different types exist.
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