I didn't understand the difference between these function.What is the importance of (+=) ?Can anyone describe?

Question

X=2
Print(X)
Now
X+=5
Print(X)
Why should we write this instead of X=X+5

Answer 1

Simplified answer: there is a thing in the world called "shortcut". This is it.

Another reason is, to increase the readability.

Answer 2

As long as I know += faster than the other syntax.