Is math a built-in function in javascript?

math is a built-in javascript object, not a built-in function. The Math object is used to perform mathematical calculations. It contains properties and methods. Its properties include standard mathematical constants, such as the pi constant PI; its methods constitute a mathematical function library, including geometric and arithmetic operations.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

math is a javascript built-in object.

Built-in objects are objects that have been written in js itself. We can use them directly without defining them; commonly used built-in objects in javascript include:

• String objects : String object, providing properties and methods for operating on strings.

• Array object: Array object provides properties and methods for array operations.

• Date object: Date and time object, which can obtain the date and time information of the system.

• Boolean object: Boolean object, a Boolean variable is a Boolean object. (No properties and methods available)

• Number object: Numeric object. A numeric variable is a numeric object.

• Math object: Mathematical object, which provides properties and methods for mathematical operations.

• RegExp

• Error

• Global

## The #Math object is used to perform mathematical calculations. It also contains properties and methods. Its properties include standard mathematical constants, such as the pi constant PI; its methods constitute a mathematical function library, including geometric and arithmetic operations. These methods and constants of the Math object are static, so when using them, you do not need to create a Math object, but directly use the Math object name to access properties or methods, such as

Math.PI, Math.random().

Some common methods of Math objects are listed below.

MethodDescriptionsin(x)Returns the sine of x , the parameter x is expressed in radianscos(x)Returns the cosine value of x, the parameter x is expressed in radianstan(x)Returns the tangent value of x, parameter x is expressed in radiansacos(x)Returns the arc cosine value of x , the parameter x must be a number between -1.0~1.0asin(x)Returns the arc sine value of x, the parameter x must be -1.0~1.0 The number betweenatan(x)returns the arctangent value of x, the parameter x must be a numerical valueabs(x)Returns the absolute value of x, parameter x must be a numerical valueceil(x)Returns greater than or equal to The minimum integer of x. The parameter x must be a numerical value. #exp(x)Returns the value of the xth act of e. The parameter x is any numerical value or expression. floor(x)log(x)Returns the natural logarithm of x, the parameter x is any value or expressionmax(x1,x2)min(x1,x2)pow(x1,x2)return Random floating point number between round(x) Returns the integer after num is rounded. The parameter x must be a numerical valuesqrt(x)Returns the square root of x. The parameter x must be a number greater than or equal to 0javascript learning Tutorial】

	Returns the largest integer less than or equal to x. The parameter x must be a numerical value
	Return the maximum value among x1 and x2. The parameters x1 and x2 must be numerical values
	Return the minimum value among x1 and x2. The parameters x1 and x2 must be numerical values
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