A $5 word I use often enough to probably quickly define here. If something is *deterministic*, that means **there is no element of randomness involved**. Basically, given the inputs you can **determine** the outputs absolutely and repeatedly. Deterministic: - Same inputs → **always** same outputs Non-deterministic: - Same inputs → *usually* same outputs - Same inputs → different outputs Deterministic: ```javascript let myNum = 6; //no randomness in assignment if(myNum > 3){ return "WAS BIG" //returns this 100% of the time } return "WAS NOT BIG" ``` Non-deterministic: ```javascript let myDiceRoll = randomIntFromInterval(1, 6); //randomly assigned if(myDiceRoll > 3){ return "WAS BIG" //returns this 50% of the time } return "WAS NOT BIG" //returns this 50% of the time function randomIntFromInterval(min, max) { // min and max included return Math.floor(Math.random() * (max - min + 1) + min); } const rndInt = randomIntFromInterval(1, 6); console.log(rndInt); ``` ``` **** # More ## Source - Myself