Hello! Initialization is an important programming concept. It refers to having a system in a perfectly known state (at least at the beginning!).
It helps you in avoiding some errors due to variables holding an unexpected value (Or no value at all for hardware systems like the Nintendo Entertainment System)
To initialize a variable, assign it any value! An example would be:
function travelTime() {
var distance = 0;
var speed = 0;
/*...*/
return distance/speed;
}
After the second line, distance is said to be “initialized”. The same goes for speed after the third line.