How to type symbols, accents, special characters, and weird punctuation

How to type square root radical sign √

On Windows:
Hold down the ALT key and type 8730 on the keypad
Note: alt code greater than 255 are not universal and will only work in applications that support them such as Wordpad or Words

On Mac OS:
Hold down the Option key and press v

√ or √

More symbols in the category: How to type math symbols | How To