Teledyne LeCroy CATC Scripting Language Reference Manual - Manual (Page 35)

C HAPTER 10
Functions CATC Scripting Language
31
the parameter x will be assigned to 1, and the parameter y will be assigned to null,
resulting in a return value of 1. But if add is called with more than two arguments
add(1, 2, 3);
x will be assigned to 1, y to 2, and 3 will be ignored, resulting in a return value of 3.
All parameters are passed by value, not by reference, and can be changed in the
function body without affecting the values that were passed in. For instance, the
function
add_1(x, y)
{
x = 2;
y = 3;
return x + y;
}
reassigns parameter values within the statements. So,
a = 10; b =
20; add_1(a,
b);
will have a return value of 5, but the values of a and b won't be changed.
The scope of a function is the file in which it is defined (as well as included files),
with the exception of primitive functions, whose scopes are global.
Calls to undefined functions are legal, but will always evaluate to null and result in
a compiler warning.