# JavaScript Math Object Reference

## The Math Object

The Math object allows you to perform mathematical tasks.**Syntax for using properties/methods of Math:**

var pi_value=Math.PI; var sqrt_value=Math.sqrt(16); |

**Note:**Math is not a constructor. All properties and methods of Math can be called by using Math as an object without creating it.

## Math Object Properties

**FF**: Firefox,

**N**: Netscape,

**IE**: Internet Explorer

Property | Description | FF | N | IE |
---|---|---|---|---|

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. 1.442) | 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 |

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 Object Methods

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 E^{x} | 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 |

JavaScript Math Object Reference
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