What are position and Functional group isomerism with example?

Position Isomerism: The compounds which are having same molecular formula but differs in their position of functional group (or) substituent are called positional isomers and the phenomenon is called positional Isomerism.
$\mathbf{\text{ Eg:}}{\mathrm{C}}_3{\mathrm{H}}_7\mathrm{OH}$

Functional group isomerism:
The compounds having same molecular formula but differs their functional group are called functional group isomers and the phenomenon is called functional group isomerism.
$\mathbf{\text{ Eg:}}{\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$