Math.PI

Math.PI 속성은 원의 둘레와 지름의 비율, 약 3.14159의 값을 가집니다.

Math.PI=π≈3.14159\mathtt{\mi{Math.PI}} = \pi \approx 3.14159

Property attributes of Math.PI
Writable no
Enumerable no
Configurable no

설명

PI는 Math의 정적 속성이므로, 사용자가 생성한 Math 객체의 속성으로 접근할 수 없고 항상 Math.PI를 사용해야 합니다. (Math는 생성자가 아닙니다)

예제

Math.PI 사용하기

다음 함수는 Math.PI를 사용해 주어진 원의 반지름에서 둘레를 계산합니다.

function calculateCircumference(radius) {
  return Math.PI * (radius + radius);
}

calculateCircumference(1);  // 6.283185307179586

명세

사양 등급 주석
ECMAScript 1st Edition (ECMA-262) Standard Initial definition. Implemented in JavaScript 1.0.
ECMAScript 5.1 (ECMA-262)
The definition of 'Math.PI' in that specification.		 Standard  
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Math.PI' in that specification.		 Standard  
ECMAScript Latest Draft (ECMA-262)
The definition of 'Math.PI' in that specification.		 Draft  

브라우저 호환성

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
PIChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support YesSafari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support YesSafari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support Yes

Legend

Full support  
Full support

같이 보기

관련 주제
  1. Standard built-in objects
  2. Math
  3. Properties
    1. Math.E
    2. Math.LN10
    3. Math.LN2
    4. Math.LOG10E
    5. Math.LOG2E
    6. Math.PI
    7. Math.SQRT1_2 [Translate]
    8. Math.SQRT2
  4. Methods
    1. Math.abs()
    2. Math.acos()
    3. Math.acosh() [Translate]
    4. Math.asin() [Translate]
    5. Math.asinh() [Translate]
    6. Math.atan() [Translate]
    7. Math.atan2() [Translate]
    8. Math.atanh() [Translate]
    9. Math.cbrt()
    10. Math.ceil()
    11. Math.clz32() [Translate]
    12. Math.cos() [Translate]
    13. Math.cosh() [Translate]
    14. Math.exp()
    15. Math.expm1() [Translate]
    16. Math.floor()
    17. Math.fround()
    18. Math.hypot() [Translate]
    19. Math.imul()
    20. Math.log()
    21. Math.log10()
    22. Math.log1p() [Translate]
    23. Math.log2()
    24. Math.max()
    25. Math.min()
    26. Math.pow()
    27. Math.random()
    28. Math.round()
    29. Math.sign()
    30. Math.sin()
    31. Math.sinh()
    32. Math.sqrt()
    33. Math.tan()
    34. Math.tanh() [Translate]
    35. Math.trunc()
  5. Inheritance:
  6. Object
  7. Properties
    1. Object.prototype.__count__ [Translate]
    2. Object.prototype.__noSuchMethod__ [Translate]
    3. Object.prototype.__parent__ [Translate]
    4. Object.prototype.__proto__ [Translate]
    5. Object.prototype.constructor
  8. Methods
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__() [Translate]
    3. Object.prototype.__lookupGetter__() [Translate]
    4. Object.prototype.__lookupSetter__() [Translate]
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource() [Translate]
    10. Object.prototype.toString()
    11. Object.prototype.unwatch() [Translate]
    12. Object.prototype.valueOf()
    13. Object.prototype.watch() [Translate]
    14. Object.setPrototypeOf()