Whiteship's Note

JavaScript Math Object

AJAX/JavaScript : 2007.07.09 15:55


참조 : http://www.w3schools.com/js/js_obj_math.asp

Matk 객체 메소드
Method Description FF N IE
abs(x) Returns the absolute value of a number 1 2 3
acos(x) Returns the arccosine of a number 1 2 3
asin(x) Returns the arcsine of a number 1 2 3
atan(x) Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians 1 2 3
atan2(y,x) Returns the angle theta of an (x,y) point as a numeric value between -PI and PI radians 1 2 3
ceil(x) Returns the value of a number rounded upwards to the nearest integer 1 2 3
cos(x) Returns the cosine of a number 1 2 3
exp(x) Returns the value of Ex 1 2 3
floor(x) Returns the value of a number rounded downwards to the nearest integer 1 2 3
log(x) Returns the natural logarithm (base E) of a number 1 2 3
max(x,y) Returns the number with the highest value of x and y 1 2 3
min(x,y) Returns the number with the lowest value of x and y 1 2 3
pow(x,y) Returns the value of x to the power of y 1 2 3
random() Returns a random number between 0 and 1 1 2 3
round(x) Rounds a number to the nearest integer 1 2 3
sin(x) Returns the sine of a number 1 2 3
sqrt(x) Returns the square root of a number 1 2 3
tan(x) Returns the tangent of an angle 1 2 3
toSource() Represents the source code of an object 1 4 -
valueOf() Returns the primitive value of a Math object 1 2 4

Math 객체 속성
Property Description FF N IE
constructor A reference to the function that created the object 1 2 4
E Returns Euler's constant (approx. 2.718) 1 2 3
LN2 Returns the natural logarithm of 2 (approx. 0.693) 1 2 3
LN10 Returns the natural logarithm of 10 (approx. 2.302) 1 2 3
LOG2E Returns the base-2 logarithm of E (approx. 1.414) 1 2 3
LOG10E Returns the base-10 logarithm of E (approx. 0.434) 1 2 3
PI Returns PI (approx. 3.14159) 1 2 3
prototype Allows you to add properties and methods to the object 1 2 4
SQRT1_2 Returns the square root of 1/2 (approx. 0.707) 1 2 3
SQRT2 Returns the square root of 2 (approx. 1.414) 1 2 3

Math 객체

Math 객체는 산술연산 작업을 할 수 있도록 도와준다.

Math 객체는 몇 몇 산술적인 변수들과 함수들을 가지고 있다. 따라서 별도의 Math 객체를 만들어 사용하지 않아도 된다.

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