What is the difference between URL and URI?

[Aiden]

I not getting the difference between URL and URI. Can anyone explain to me the difference?

[Elliott]

URL means Uniform Resource Locator. Even I am eager to know what is URI.

[Myles Ace]

URI means Uniform Resource Identifier. It is a sequence of characters that classifies a source on the internet either by locality or by designation, or both.

[Ivy Afton]

In short it is a technique to identify the resource.

[Blake Acy]

So, what exactly is the difference between the two?