# Difference between integral, anti-derivative, and definite integral?

I'm just starting to learn about anti-derivative (which is basically function F whose derivative is equal to the original function f).

What I want to know is that, is anti-derivative and integral the same thing?

And if so, what is a definite integral? My textbook doesn't go into definite integrals, right know we are dealing with indefinite integrals. What does this mean?

Please don't get too mathy in the explanation

• indefinite integral is antiderivative, definite integral is area under curve. – Karolis Juodelė Dec 2 '16 at 20:43

The indefinite integral is the set of antiderivatives (hence the important $+C$ for intervals) and the definite integral is accumulation - equal to the area under the curve $y=f(x)$ if $f \geq 0$. Bottom line: