How do you get minimum or maximum value of constant in a function?

To find the minimum or maximum value of a constant in a function, you first need to identify if the constant is part of a larger expression or if it stands alone. If it's part of a function, you can analyze the function's critical points by taking its derivative and setting it to zero to find local extrema. Then, evaluate the function at these critical points and the boundaries of the domain to determine the overall minimum or maximum value. If the constant is standalone, it remains unchanged as it does not vary with input.