Actual parameters are the parameters which you specify when you call the subroutine such as Functions or Procedures. These are actually the values you provide to the subroutine when you call them. You can call a subroutine without an actual parameter when the formal parameter has a default value. Difference between Actual and Formal Parameters in PL/SQL Last Updated: A parameter is an optional list of parameters that you define both pass information into the procedure and send information out of procedure back to the calling program. In simpler terms, the argument the actual value that is supplied to a function whereas the parameter is the variable inside the definition of the function. We can say that a parameter is a type that appear in function definitions, while an argument is an instance that appear in function calls. For example, consider the following function definition. Actual parameters are situated in caller method and formal parameters are written in called function. Windows 7 vmdk image download. That is if we write a method called 'sum ' with two parameter called 'p' and 'q'. These parameters are known as formal parameters.
Argument: An argument is an expression which is passed to a function by its caller (or macro by its invoker) in order for the function(or macro) to perform its task. It is an expression in the comma-separated list bound by the parentheses in a function call expression.
Actual arguments:
The arguments that are passed in a function call are called actual arguments. These arguments are defined in the calling function.
Formal arguments:
The formal arguments are the parameters/arguments in a function declaration. The scope of formal arguments is local to the function definition in which they are used. Formal arguments belong to the called function. Formal arguments are a copy of the actual arguments. A change in formal arguments would not be reflected in the actual arguments.
Example:
Formal arguments:
The formal arguments are the parameters/arguments in a function declaration. The scope of formal arguments is local to the function definition in which they are used. Formal arguments belong to the called function. Formal arguments are a copy of the actual arguments. A change in formal arguments would not be reflected in the actual arguments.
Example:
Here 3,2*a,a are actual arguments and i,j,k are formal arguments.