32_variable_lookup.js

// Lookup variable
// js always lookup variable

const numGlobal = 100;

function total(num1, num2) {
 //120 cz use numGlobal 100, but if inside function
 //has nameGlobal with 50 result be 70
 const numGlobal = 50;
 const result = num1 + num2 + numGlobal;
 //inner function
 function multiply() {
 //if result * numGlobal use value in function total
 // sum be 3500, same with total function
 // if multiply has local nameGlobal 1000 sum be 70000
 const numGlobal = 1000;
 const sum = result * numGlobal;
 console.log(sum); //70000
 }
 multiply();
 return result;
}

const result = total(10, 10);
console.log(result);