Summary of usage of random, round, ceil, floor of Math in js_javascript skills

1.Math.random(); The result is a random number between 0-1 (including 0, excluding 1)
Math.random(); The result is a random number between 0-1 (including 0, excluding 1) [html] view plaincopyprint?


2.Math.floor(num); The parameter num is a numerical value, and the function result is the integer part of num (returns the largest integer less than or equal to n).

Math.floor(num); The parameter num is a numerical value, and the function result is the integer part of num (returns the largest integer less than or equal to n). [html] view plaincopyprint?


3.Math.round(num); The parameter num is a numerical value, The function result is the integer after num is rounded.

Math.round(num); The parameter num is a numerical value, and the function result is the integer after num is rounded. [html] view plaincopyprint?


4.Math.ceil(n); Returns the smallest value greater than or equal to n integer.

Math.ceil(n); Returns the smallest integer greater than or equal to n. [html] view plaincopyprint?


5.Math.ceil(Math.random()*10); When , it mainly obtains random integers from 1 to 10, and the probability of obtaining 0 is extremely small.

Math.ceil(Math.random()*10); mainly obtains random integers from 1 to 10, and the probability of obtaining 0 is extremely small. [html] view plaincopyprint?


6.Math.round(Math.random());Can be balanced Get a random integer from 0 to 1.

Math.round(Math.random()); can obtain random integers from 0 to 1 evenly. [html] view plaincopyprint?


7.Math.round(Math.random()*10); When , random integers from 0 to 10 can be obtained in a basically balanced manner, with the probability of obtaining the minimum value 0 and the maximum value 10 being less than half.

Math.round(Math.random()*10);, random integers from 0 to 10 can be obtained in a basically balanced manner, and the probability of obtaining the minimum value 0 and the maximum value 10 is less than half. [html] view plaincopyprint?


8.Math.floor(Math.random()*10); When , random integers from 0 to 9 can be obtained evenly.