In JavaScript engine, there are Call Stack and Memory Heap.
- Call Stack: Where are in code in order
- Memory Heap: A place to store and write
We need the memory heap as a place to store and write information.
With Call Stack, we need a place to keep track of we are in the code in order.
Every time, we run the code we use call stack. We can think of call stack as a region in memory that operates in first in last out mode.
function subThree(num) {
return num - 3;
}
function calculate(num) {
const sumTotal = num;
return subThree(sumTotal);
}
calculate(5);Call Stack [it run first in last out]
(anonymous)
calculate()
subThree()