x=input('enter how close you want to get to e with (1+1/n)^n')
u=exp(1);
count=1;
y=(1+(1/count))^count;
while (abs(y-u)>=x)
    count=count +1;
    y=(1+(1/count))^count;
end
fprintf('we needed %d computations to get within %f of e\n',count,x)