Can anybody help this loop question?

Temp = 20;
g = 0.1;
x = 0.11;
while(Temp > 0 && x ~= g)
    Temp = Temp -1
    x = x -0.001
    if(x==g)
        print('lalala')
    end
end

Running code shown above should give me a 'lalala' message in commond window at 10th loop, but I didn't get it and also it didn't break the while loop when x==g;

I added a break point inside the loop and trying to run in step, I get results in the figure below and matlab judge that x==g is logic 0 while they should equal to each other.

Can somebody help explain it?

[Stephen23]

Question was continued here:

https://www.mathworks.com/matlabcentral/answers/446178-why-this-x-g-gave-me-logic-0

Answer 1

[KSSV]

Temp = 20;
g = 0.1;
x = 0.11;
while(Temp > 0 && x ~= g)
    Temp = Temp -1
    x = x -0.001
    if abs(x-g)<=10^-3
        disp('lalala')
    end
end

Read about how to compare flottant numbers.

[Stephen23]

Note: "flottant numbers" are known as floating point numbers in English:

https://www.mathworks.com/help/matlab/matlab_prog/floating-point-numbers.html

https://en.wikipedia.org/wiki/Floating-point_arithmetic

They are known as "flottante" in French.