👉 An integral is a mathematical function that represents the area under the curve of a continuous function between two points. It is named after the Greek letter "π" which stands for pi. The integral of a function f(x) over an interval [a,b] is defined as: ∫f(x) dx = F(b) - F(a) where F(b) and F(a) are the limits of integration, and ∫ represents the indefinite integral. For example, consider the function y = x