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A later section (see section 18.5.7 Calculator Internals) gives a full description of
Calc's internal Lisp functions. It's not hard to call Calc from
inside your programs, but the number of these functions can be daunting.
So Calc provides one special "programmer-friendly" function called
calc-eval
that can be made to do just about everything you
need. It's not as fast as the low-level Calc functions, but it's
much simpler to use!
It may seem that calc-eval
itself has a daunting number of
options, but they all stem from one simple operation.
In its simplest manifestation, `(calc-eval "1+2")' parses the
string "1+2"
as if it were a Calc algebraic entry and returns
the result formatted as a string: "3"
.
Since calc-eval
is on the list of recommended autoload
functions, you don't need to make any special preparations to load
Calc before calling calc-eval
the first time. Calc will be
loaded and initialized for you.
All the Calc modes that are currently in effect will be used when evaluating the expression and formatting the result.
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