Recursion in programming can be used to solve complex problems by breaking them down into smaller subproblems.One classic example of recursion is calculating the nth number in the Fibonacci sequence using the formula fₙ = fₙ₋₁ + fₙ₋₂.However, recursion requires a base case to stop the recursion and avoid infinite loops.In the case of the Fibonacci sequence, the base case is defined as f₀ = 0 and f₁ = 1.