Check out example codes for "procedures in pl sql". It will help you in understanding the concepts better.

Code Example 1

CREATE PROCEDURE nome_procedura [(parametri)] IS
	Definizioni;
BEGIN
	Corpo procedura;
END;

Code Example 2

CREATE [OR REPLACE] PROCEDURE procedure_name 
[(parameter_name [IN | OUT | IN OUT] type [, ...])] 
{IS | AS} 
BEGIN 
  < procedure_body > 
END procedure_name;

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