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);
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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 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 |
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