function makePredicateFunc(min, max){
  return function(num){
     return num >= min && num <= max;
  }
}
 
const isChild = makePredicateFunc(0,17);
console.log(isChild); 

// Output
ƒ (num) {
    return num >= min && num <= max;
}

Why the output mentions min and max variable name instead of values 0 and 17 ?

min, max variable should have replaced with hard coded values

// Output should be like this f(num) { return num >= 0 && num <= 17; }