PDF stands for Probability Density Function. It describes the relative likelihood of a continuous random variable taking on a particular value.
The PDF of a continuous random variable is denoted as f(x) and is used to calculate the probability of the variable lying between a specific range of values.
The CDF, or Cumulative Distribution Function, gives the probability that a random variable takes a value less than or equal to a given value.
The CDF accumulates probabilities from the leftmost possible value up to a given value and satisfies specific properties, such as starting at 0 and approaching 1.