KRL allows the parameters of functions and user-defined actions to have default values. If the function or action is called without a parameter, that parameter gets its defaults value. Furthermore, arguments can be passed to functions and user-defined actions using named arguments.
Here is an example of the function foo() with two arguments, bar and baz. You can see that each has been given a default value:
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|---|---|---|---|---|
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foo = function(bar = 2, baz = bar + 3){
bar + baz
} |
This function could be called in several ways:
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a = foo() // a has the value 7 a = foo(5) // a has the value 13 because bar gets the value 5 and baz gets its default value a = foo(5, 6) // a has the value 11 since bar gets the value 5 and baz gets the 6 a = foo(baz = 6) // a has the value 8 since bar get its default value 2 and baz get the value 6 a = foo(bar = 5) // a has the value 13 because bar gets the value 5 and baz gets its default value a = foo(bar = 5, baz = 6) // a has the value 11 since bar gets the value 5 and baz gets the 6 a = foo(baz = 6, bar = 5) // a has the value 11 since bar gets the value 5 and baz gets the 6 |
The same syntax is used in user-defined action with the same effect on parameter values.