How do you write exponents in the computer?

Answer 1

If you're talking about how to type them here in this website, then the little [x²] button above the editing box will turn highlited text into superscript.

In spreadsheets (such as Excel) and many programming languages, using the carat [^] symbol (shift-6, on the keyboard), will raise to a power. Example:

• in Excel, typing =2^3 will return 8. [2³ equals 8]
• also, typing =9^.5 will return 3. [square root is same as raising to the ½ power]