Sometimes, we need to hide all the values in the cell, and then you can select the cells that contain the values you want to hide. Click the format → cell command, select the Number tab, and in the Category list, select Custom.
Then delete the code already in the Type box, and type ";;;" (3 semicolons).
You may wonder why this is so, in fact, the custom format for cell numbers is made up of positive, negative, 0, and 4 parts of the text. These 4 parts are separated by 3 semicolons, which are empty, and the corresponding content is not displayed in the cell. It's all empty now, and of course it doesn't show.