Use of subscript /use of superscript

Question

someone explain to how this element function

Answer 1

Subscript text is created by using the  element in html, and will typically display the text that is in the sub element in a smaller font size, and below the baseline of the main text. Superscript  is the exact opposite, and is displayed in a smaller font, but this time above the heading line of the text. These are useful for denoting scientific measurements, temperate, chemical compounds, and various other data.