what is the difference between parameter and argument in computer science?

what is the difference between parameter and argument in computer science?
The term parameter refers to any declaration within the parentheses following the function name in a function declaration or definition; the term argument refers to any expression within the parentheses of a function call.
1.parameter used in procedure defination
2.arguments used in procedure call
This example demonstrates the difference between a parameter and an argument:
void foo(int a,char b); //a and b are parameters,
here procedure is define
int main()
{
foo(5,'a'); //5 and 'a' are arguments,
here procedure is called
return 0;
}