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Maggie Lodge
3,373 PointsRandom number function question
What is the difference between these two lines of code? They both return random numbers in the Console log.
const randomNumber = Math.floor(Math.random() * (upper-lower+1)) + lower;
const randomNumber = Math.floor(Math.random() * (upper)) + lower;
1 Answer
![Steven Parker](https://uploads.teamtreehouse.com/production/profile-photos/969492/micro_tool_chess_set_2.jpg)
Steven Parker
230,688 PointsThe first line implements the standard formula for a random number between (inclusively) two values. For example, if "lower" was set at 100 and "upper" was set at 200, the final result would always be at least 100 and never higher than 200.
The second line isn't a standard formula. Given the same example with "lower" and "upper" set at 100 and 200, the value generated would also be at least 100 but could be as high as 299.