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/**

* multiply(a)(b)(c)....(n)() should return the product of all the numbers a*b*c*..*n.

*

* For example, multiply(1)(2)(3)() = 6

*

*/

// ES5 Solution

function mul(a) {

return function (b) {

if (!b) return a;

return mul(a * b);

};

}

// ES6 Solution

const multiply = (a) => {

return (b) => {

if (!b) return a;

return multiply(a*b);

}

}

// one-liner solution

const multiplication = a => b => b ? multiply(a*b) : a