what is probability density function

A probability density function (PDF) is a function that is used in probability theory to describe the likelihood of a continuous random variable falling within a particular range of values. It is a non-negative function, and the area under the curve of the function over the entire range of values is always equal to one. The value of the PDF at any given point can be interpreted as the relative likelihood of the random variable taking on that value. It is important to note that the value of the PDF at a specific point is not the probability of the random variable being equal to that point, but rather the density of the probability. The graph of a PDF typically resembles a bell curve, with the probability of the outcomes lying below the curve