Create guess and Check loop in matlab

How can I create a guess and check loop for solve this equation: y=(2*x)-((2*x^2)*(1-exp(-1/x)))==0.211

Is there another way to solve this question?

Answer 1

[Chunru]

y= @(x) (2*x)-((2*x.^2)*(1-exp(-1./x))) - 0.211;   % define the function f(x)=0
x = fsolve(y, 0);       % here x0 = 0;

help fsolve for more details.

[Xerxes Achaemenid]

Thank you