Square Root Key On Keyboard [updated]
If you are specifically typing in Microsoft Word, you is a special "Math Autocorrect" feature.
If you really want the √ symbol, copy-paste it from Character Map or use the Windows/Mac shortcuts above. square root key on keyboard
=SQRT(25) → returns 5
You can type (∛) and fourth root (∜) with Unicode: If you are specifically typing in Microsoft Word,