JavaScript Object -- Math

Math object

Math objects are used to execute mathematical tasks.

Use the attributes and method Syntax of Math:

Var pi_value = Math. PI;

Var sqrt_value = Math. sqrt (15 );

Note: Math objects are not classes of objects as Date and String, So Math () is not a constructor, such as Math. A function like sin () is just a function, not a method of an object. You can call all attributes and methods of a Math object without creating it.

Math Object Attributes

FF: Firefox, IE: Internet Explorer

Attribute
Description
FF
IE
 
E
Returns the base number of the natural logarithm (approximately 2.718) of the arithmetic constant e ).
1
3
 
LN2
Returns the natural logarithm of 2 (approximately 0.693 ).
1
3
 
LN10
Returns the natural logarithm of 10 (approximately 2.302 ).
1
3
 
LOG2E
Returns the base-2 logarithm of e (approximately 1.414 ).
1
3
 
LOG10E
Returns the base-10 logarithm of e (approximately 0.434 ).
1
3
 
PI
Returns the circumference rate (approximately 3.14159 ).
1
3
 
SQRT1_2
Returns the reciprocal of the square root of 2 (approximately 0.707 ).
1
3
 
SQRT2
Returns the square root of 2 (approximately 1.414 ).
1
3
 

Math object Method

FF: Firefox, IE: Internet Explorer

Method
Description
FF
IE
 
Abs (x)
Returns the absolute value of a number.
1
3
 
Acos (x)
Returns the arc cosine of a number.
1
3
 
Asin (x)
Returns the arc sine of the number.
1
3
 
Atan (x)
Returns the arc tangent value of x with a value between-PI/2 and PI/2 radian.
1
3
 
Atan2 (y, x)
Returns the angle from the x-axis to the point (x, y) (between-PI/2 and PI/2 radian ).
1
3
 
Ceil (x)
The logarithm is rounded up.
1
3
 
Cos (x)
Returns the cosine of the number.
1
3
 
Exp (x)
Returns the index of e.
1
3
 
Floor (x)
The logarithm is deprecated.
1
3
 
Log (x)
Returns the natural logarithm of the number (Base e ).
1
3
 
Max (x, y)
Returns the highest value in x and y.
1
3
 
Min (x, y)
Returns the lowest value in x and y.
1
3
 
Pow (x, y)
Returns the Power y of x.
1
3
 
Random ()
Returns 0 ~ A random number between 1.
1
3
 
Round (x)
Round the number to the nearest integer.
1
3
 
Sin (x)
Returns the sine of the number.
1
3
 
Sqrt (x)
Returns the square root of a number.
1
3
 
Tan (x)
Returns the tangent of the angle.
1
3
 
ToSource ()
Returns the source code of the object.
1
-
 
ValueOf ()
Returns the original value of the Math object.
1
4