Difference between parameter and argument?

Question

Is there a difference between a "parameter" and an "argument", or are they simply synonyms?

Answer 1

There is a subtle difference. A parameter is the name of a corresponding variable in the function signature, and argument is a value that the variable corresponds to.

Example:

int aPlusB(int a, int b)

{

...

}

int result = aPlusB(1, 2);

In the example, a and b are parameters of the function but 1 and 2 are the arguments.