function addFunction(num){
var fun =function(num2){ return num+num2}
num++;
return fun;
}
console.log(addFunction(5)(5));
ZnVuY3Rpb24gYWRkRnVuY3Rpb24obnVtKXsKICAgICAgICB2YXIgZnVuID1mdW5jdGlvbihudW0yKXsgcmV0dXJuIG51bStudW0yfQogICAgICAgIG51bSsrOwogICAgICAgIHJldHVybiBmdW47Cn0KY29uc29sZS5sb2coYWRkRnVuY3Rpb24oNSkoNSkpOwo=