What is superscripted and subscripted

Answer 1

While writing H2O (water), the 2 is written at a little bottom. That's subscript.

While writing power, like a^2, here 2 should be written at top right. This style is superscript.

https://code.sololearn.com/WqganlVhIS9K/?ref=app

Answer 2

Superscript text example - Google™
Here TM or ™ is shown in superscript. In superscript text appears at top.

Subscript is opposite of superscript meaning instead of near top text appears near foot.

Answer 3

Superscript: a² + b² = c², McDonalds™

Subscript: CO₂, H₂SO₄