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restart;
S:=Sum(1/n!,n=0..N);
0!;
S5:=subs(N=5,S);
value(S5);
evalf(S5);
S10:=subs(N=10,S);
value(S10);
evalf(S10);
R10:=3/(10+1)!;
evalf(R10);
evalf(3/(13+1)!);
evalf(exp(1));
A1:=limit(S,N=infinity);
value(A1);

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