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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
Math.PI,
Math.random().
Description | |
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Returns the sine of x , the parameter x is expressed in radians | |
Returns the cosine value of x, the parameter x is expressed in radians | |
Returns the tangent value of x, parameter x is expressed in radians | |
Returns the arc cosine value of x , the parameter x must be a number between -1.0~1.0 | |
Returns the arc sine value of x, the parameter x must be -1.0~1.0 The number between | |
returns the arctangent value of x, the parameter x must be a numerical value | |
Returns the absolute value of x, parameter x must be a numerical value | |
Returns greater than or equal to The minimum integer of x. The parameter x must be a numerical value. | |
Returns the value of the xth act of e. The parameter x is any numerical value or expression. | |
Returns the largest integer less than or equal to x. The parameter x must be a numerical value | |
Returns the natural logarithm of x, the parameter x is any value or expression | |
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 | |
return Random floating point number between | |
Returns the integer after num is rounded. The parameter x must be a numerical value | |
Returns the square root of x. The parameter x must be a number greater than or equal to 0 | |
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