JavaScript Math Object

Math (arithmetic objects) performs common arithmetic tasks.

1. Properties of the Math object

// The base of the natural logarithm, which is the value of the constant e // Natural logarithm of 10 // Natural logarithm of 2 // 2 logarithm of base e // 10 logarithm of base e // the value of π // The square root of 1/2 (that is, the reciprocal of the square root of 2) // square root of 2

2, Min (), Max (), and apply () methods

Used to determine the minimum and maximum values in a set of values.

Cases:

var max = Math.max (1, 2, 3, 4, 5); // 5 var min = math.min (1, 2, 3, 4, 5); // 1 var values = [1, 2, 3, 4, 5]; var max = Math.max.apply (Math, values); // 5 var min = Math.min.apply (Math, values); // 1

3. Rounding Method

(1) Math.ceil () performs an upward rounding.

(2) Math.floor () performs a downward rounding.

(3) Math.Round () performs standard rounding, that is, rounding.

Cases:

Console.log (Math.ceil (2.1)); // 3Console.log (Math.floor (3.9)); // 3Console.log (Math.Round (3.3)); // 3

4. Random () method

Returns a random number greater than or equal to 0 less than 1.

Cases:

Console.log (Math.floor (Math.random () * 10 + 1)); // values from 1 to 10

5. Other methods

Math.Abs (num); // returns the absolute value of Num Math.exp (num); // returns the NUM power of MATH.E Math.log (num); // returns the natural logarithm of Num Math.pow (num, power); // returns the power sub power of Num MATH.SQRT (num); // returns the square root of Num Math.acos (x); // returns the inverse cosine value of x ...

JavaScript Math Object