The tick mark of "√" is not a common symbol, and there is no Alt code for quick input, so to input "√", you can only input it through the input method symbol tool or insert "√" in the office tool and copy and paste it into the required input position. Taking the QQ five-stroke input method as an example, the steps of inputting "√" are as follows:

Required materials: QQ five-stroke input method.

First, the shortcut key Ctrl+Shift is switched to the QQ five-stroke input method, and then the symbol code "ZZ" of the QQ five-stroke input method is input.

Second, click the Page Turn key in the upper right corner of the text box to turn pages, or you can use the PageDown key and PageDown key to turn pages.

3. After turning to the last page, enter the number 1 to enter the "Mathematical Symbols" list.

4. Turn the page with the page turning key again, find the "√" check mark, and click the number "3" to enter.