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Function management
3. CREATE OR REPLACE FUNCTION – practice

## Instruction

Good job! It's your turn to use the CREATE OR REPLACE FUNCTION command. Recall the get_circumference() function we wrote in Part 1:

CREATE FUNCTION get_circumference(diameter decimal)
RETURNS decimal AS $$BEGIN RETURN get_pi() * diameter; END;$$ LANGUAGE PLpgSQL;


We'd like this function to return the circumference rounded to two decimal places.

## Exercise

Replace the existing get_circumference() function with the new implementation that rounds its result to two decimal places.

Use the round() function.