Describe the difference between formal and actual parameters

• Parameters in the procedure declaration known as formal parameters. Actual parameters contain the values passed to the procedure when it is called.

• Actual parameters contain the values passed to the procedure when it is called.
• The formal parameters are the placeholders for the values of the actual parameters.
• The constraints CHAR and VARCHAR2 for parameters should always come from the actual parameters.
• The only way to get constraint on a formal parameter is to use %TYPE.