How can you use the default value of an argument when it is declared before the other parameters?

Question

func example(int a=1, int b=2)
return a+b;
int main(){

//how do you use the example function for a given value of b and the default value of a?

Answer 1

https://code.sololearn.com/cDmptzsCe7tX/?ref=app

Answer 2

ooo I misread. You would have to list b first.

so int example(int b = 1, int a =1)
example(3);

Edit: example fixed