GFem language documentation -- 3.4.3 Value of a function at one point

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### 3.4.3 Value of a function at one point

If `f` has been defined earlier then it is possible to write `a:=f(1.2,3.1);` Then a has the value of `f` at `x=1.2` and `y=3.1` .

It is also allowed to do

    x1:=1.2;
    y1:=1.6;
    a:=f(x1,2*y1);
    save('a.dta',a);

Remark: Recall that ,`a` being a scalar, its value is appended to the file `a.dta`.