JavaScript-数学对象

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📜 JavaScript-数学对象

📅 最后修改于: 2020-12-18 05:03:51 🧑 作者: Mango

数学对象为您提供数学常数和函数的属性和方法。与其他全局对象不同， Math不是构造函数。 Math的所有属性和方法都是静态的，可以通过将Math用作对象来调用而不创建它。

因此，您将常数pi称为Math.PI ，并将正弦函数称为Math.sin(x) ，其中x是方法的参数。

调用Math属性和方法的语法如下

var pi_val = Math.PI;
var sine_val = Math.sin(30);

数学性质

这是Math的所有属性及其描述的列表。

Sr.No.	Property & Description
1	E \ Euler’s constant and the base of natural logarithms, approximately 2.718.
2	LN2 Natural logarithm of 2, approximately 0.693.
3	LN10 Natural logarithm of 10, approximately 2.302.
4	LOG2E Base 2 logarithm of E, approximately 1.442.
5	LOG10E Base 10 logarithm of E, approximately 0.434.
6	PI Ratio of the circumference of a circle to its diameter, approximately 3.14159.
7	SQRT1_2 Square root of 1/2; equivalently, 1 over the square root of 2, approximately 0.707.
8	SQRT2 Square root of 2, approximately 1.414.

在以下各节中，我们将通过一些示例来演示Math属性的用法。

这是与Math对象关联的方法及其说明的列表

Sr.No.	Method & Description
1	abs() Returns the absolute value of a number.
2	acos() Returns the arccosine (in radians) of a number.
3	asin() Returns the arcsine (in radians) of a number.
4	atan() Returns the arctangent (in radians) of a number.
5	atan2() Returns the arctangent of the quotient of its arguments.
6	ceil() Returns the smallest integer greater than or equal to a number.
7	cos() Returns the cosine of a number.
8	exp() Returns E^N, where N is the argument, and E is Euler’s constant, the base of the natural logarithm.
9	floor() Returns the largest integer less than or equal to a number.
10	log() Returns the natural logarithm (base E) of a number.
11	max() Returns the largest of zero or more numbers.
12	min() Returns the smallest of zero or more numbers.
13	pow() Returns base to the exponent power, that is, base exponent.
14	random() Returns a pseudo-random number between 0 and 1.
15	round() Returns the value of a number rounded to the nearest integer.
16	sin() Returns the sine of a number.
17	sqrt() Returns the square root of a number.
18	tan() Returns the tangent of a number.
19	toSource() Returns the string “Math”.

在以下各节中，我们将通过一些示例来演示与Math相关的方法的用法。