To type the square root symbol, enable the Num Lock key, hold down the Alt key on your keyboard, and type the numbers 0251. If you are using a laptop computer, you must also hold down the Function key, which is not present on desktops.
- Make sure that the Num Lock key is on
All keyboards have a light indicating whether Num Lock is on or off. Ensure that this light is on. If not, press the Num Lock key.
- Find the Alt key on a desktop or the Function key on a laptop
The Alt key is next to the spacebar. On a laptop, the Function (Fn) key is usually in the same row.
- Locate the numeric keypad
The numeric keypad is on the far right side of a desktop keyboard. On a laptop, the keys on the right half of the keyboard also function as a numeric keypad.
- Enter the Alt code
While holding down the Alt key (or the Alt and Function keys on a laptop), use the numeric keypad to enter 0251.