Meaning of L-component display?

Hi, I don't understand what is the meaning of this coding?

imshow(lab(:,:,1),[0 100])

why there is [0 100]? what is the meaning of that code?

I read the code from here https://www.mathworks.com/help/images/ref/rgb2lab.html

[nurul atikah mohd sharif]

L*

Luminance or brightness of the image. Values are in the range [0, 100], where 0 specifies black and 100 specifies white. As L* increases, colors become brighter.

ok, i have found the asnwer why it is range [0 100]. It's noted at the document as well.

Answer 1

[yanqi liu]

imshow(lab(:,:,1),[0 100])

sir, its means use lab(:,:,1) data，display in [0,100] range，if data more than 100，will be change as 100 to display