Which parameter in a procedure can be assigned a default value?
You can set a default value of a formal parameter by including the DEFAULT clause or using the assignment operator (:=) in the CREATE PROCEDURE or CREATE FUNCTION statement. name is an identifier assigned to the parameter. IN|OUT|IN OUT specifies the parameter mode. data_type is the data type assigned to the variable.
What is default parameter in stored procedure?
The default is an input parameter. To specify an output parameter, the OUTPUT keyword must be specified in the definition of the parameter in the CREATE PROCEDURE statement. The procedure returns the current value of the output parameter to the calling program when the procedure exits.
Which parameter mode is the default?
PL/SQL supports 3 parameter modes on procedure/function parameters: IN: This is the default mode. IN parameters allow the calling code to pass values into the procedure or function. OUT: OUT parameters allow the procedure or function to pass values back to the calling code.
Which kind of parameters Cannot have a default value?
An IN OUT parameter cannot have a default value. An IN OUT actual parameter or argument must be a variable. It cannot be a constant, literal, or expression, since these formats do not provide a receptacle in which PL/SQL can place the outgoing value.
What are the 3 modes of parameter?
PL/SQL procedure parameters can have one of three possible modes: IN, OUT, or IN OUT. PL/SQL function parameters can only be IN. An IN formal parameter is initialized to the actual parameter with which it was called, unless it was explicitly initialized with a default value.
What are the three parameter mode for?
The three parameter modes, IN (the default), OUT , and IN OUT , can be used with any subprogram. However, avoid using the OUT and IN OUT modes with functions. The purpose of a function is to take no arguments and return a single value.
What is a default parameter in C++?
A default argument is a value provided in a function declaration that is automatically assigned by the compiler if the caller of the function doesn’t provide a value for the argument with a default value. Following is a simple C++ example to demonstrate the use of default arguments.