Using inner function, function chain rules, currying, and high order function to design an add function so that the chain function calls can collect the sum at the variable z.

Sample Output :

>>z=0 >>add(1) >>print(z) 1 >>z=0 >>add(1)(2)(3)(4)(5) >>print(z) 15 >>z=0 >>add(2)(4)(6)(8)(10) >>print(z) 30 >>z=0 >>add(3)(1)(5)(2)(7) >>print(z) 18