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1.min () and max () methods

Math.min () is used to determine the minimum value in a set of values. Math.max () is used to determine the maximum value in a set of values.

Alert (Math.min (2, 4, 3, 3, 6, 3, 3, 8, 0, 0, 1)); / / minimum alert (Math.max, 4, 7, 8, 3, 1, 9, 6, 0, 3, 2)); / / maximum

two。 Rounding method

Math.ceil () performs up rounding, that is, it always rounds the value up to the nearest integer

Math.floor () performs down rounding, that is, it always rounds the value down to the nearest integer

Math.round () performs standard rounding, that is, it always rounds the value to the nearest integer

For example:

Alert (Math.ceil); / 26alert (Math.floor); / 25alert (Math.floor); / 25alert (Math.floor); / / 25alert (Math.round); / 26alert (Math.round); / / 26alert (Math.round) / / 25

3.random () method

The Math.random () method returns a random number between 0 and 1, excluding 0 and 1. If you want to be larger than this range, you can apply the following formula:

Value = Math.floor (Math.random () * Total + first value)

For example:

Alert (Math.floor (Math.random () * 10 + 1)); / / randomly generate any number between 1 and 10

For (var I = 0; I

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