Question

In Java, which is a variable that gets its value from an argument: a local variable, a boolean expression, a parameter, or an argument?

Answer 1

A Parameter, Or Argument:

In java parameter is a variable that gets its value from argument A parameter is a value that you can pass to a method in Java. Then the method can use the parameter as though it were a local variable initialized with the value of the variable passed to it by the calling method.An argument is a value passed to a function when the function is called. Whenever any function is called during the execution of the program there are some values passed with the function. These values are called arguments. An argument when passed with a function replaces with those variables which were used during the function definition and the function is then executed with these values.

Example:

public class Example {

   public static int multiply(int a, int b)
   {
       return a + b;
   }

   public static void main(String[] args)
   {
       int x = 2;
       int y = 5;

       // the variables x and y are arguments
       int sum = multiply(x, y);

       System.out.println("SUM IS: " + sum);
   }
}

Output:

SUM IS: 7

In the above example in the function main the variable x and y are the arguments.

A parameter is a variable used to define a particular value during a function definition. Whenever we define a function we introduce our compiler with some variables that are being used in the running of that function. These variables are often termed as Parameters. The parameters and arguments mostly have the same value but theoretically, are different from each other.

public class Example {

   // the variables a and b are parameters
   public static int multiply(int a, int b)
   {
       return a + b;
   }

   public static void main(String[] args)
   {
       int x = 2;
       int y = 5;

       int sum = multiply(x, y);

       System.out.println("SUM IS: " + sum);
   }
}

Output:

SUM IS: 7

In the above example in the function multiply the variable a and b are the parameters.

ARGUMENT:

-When a function is called, the values that are passed in the call are called arguments.

-These are used in function call statement to send value from the calling function to the called function.

-These are used in function call statement to send value from the calling function to the called function.

-They are also called Actual Parameters.

PARAMETER:

-The values which are written at the time of the function prototype and the definition of the function.

-These are used in function header of the called function to receive the value from the arguments.

-Parameters are local variables which are assigned value of the arguments when the function is called.

-They are also called Formal Parameters.