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MD MONIRUZZAMAN
6,130 PointsAdding 1 inside
What is the difference between
const dieRoll = Math.floor(Math.random()*6) +1;
const dieRoll = Math.floor(Math.random()*6 +1 );
2 Answers
Steven Parker
231,261 PointsSince the "floor" function only affects the fractional part of a value, it makes no difference if a whole number is added before or after. So those two statements will perform exactly the same.
Scott Hert
2,364 PointsTo answer the question from Zachery Smith, if you use Math.ceil it will round 0.000001 to 1 and then add 1 making 2 the lowest possible roll, and round anything greater the 5.0 to 6. Then add 1 making 7.
boi
14,242 PointsGood one Scott!
Zachary Smith
Full Stack JavaScript Techdegree Graduate 16,616 PointsZachary Smith
Full Stack JavaScript Techdegree Graduate 16,616 PointsOne thing I still am not clear on is why in the video, he says not to use Math.ceil for the die example because it could return a zero. How is this possible? Doesn't "Math.random()" return a number between 0 and 1? Even if the random number is .000001, that would express to a 1, would it not? I've tried referring to the notes on Mozilla which state "The Math.ceil() function always rounds a number up to the next largest whole number or integer.". I guess I'm missing something....
EDIT: Disregard, it seems I missed the part where he says it could gen a number from zero up to, but not including 1.