We simply use evalf to convert the result of the summation into a floating-point number:

EXECUTEevalf(sum(1/(2*'i'), 'i' = 1..10));

This is an important idea: the result of one built-in function can be passed as an argument to another built-in function.

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Joseph L. Zachary
Hamlet Project
Department of Computer Science
University of Utah