Finally, when a block returns a value, you can call its block variable like a function.

double (^divBlock)(double,double) = ^(double k, double j) {
    return k/j;
}

In this code, you’ve declared divBlock as a block variable that returns a double and expects two doubles as arguments. Then you assigned it a value which includes the instruction to return the result of dividing the two arguments.

You can use this block like so:

double quotient = divBlock(42.0, 12.5);