<input type="button" /> and <button >,what's the difference?

Question

I've not known that there exist such a tag as until today,a little shocked!

Answer 1

Check this article

Inputs vs Buttons

Buttons created with the BUTTON element function just like buttons created with the INPUT element, but they offer richer rendering possibilities: the BUTTON element may have content. For example, a BUTTON element that contains an image functions like and may resemble an INPUT element whose type is set to “image”, but the BUTTON element type allows content.

Answer 2

Basically, <button> is more flexible as it can contain other tags inside it. Like,

<button type="submit"><strong>Click</strong> me, <em>user!</em></button>

You won't be able to do this with regular <input>.

Answer 3

You can include images in a <button> tag, but not in an <input> tag, amoung other differences

Answer 4

See: W3C site

They are very similar but the tag has a few extras that can be useful on the odd occasion.