The Math object is an object that allows you to perform mathematical tasks on numbers. This object includes several mathematical methods. JavaScript Examples
abs[]
| Data type | function |
|---|---|
| Return type | number |
| Parameter list | x (number) |
| Standard | ECMA-262 §15.8.2.1 |
| Documentation | Mozilla, Microsoft |
Returns the absolute value of (that is, a positive number of the same magnitude as) x.
Math.abs(-1) // 1
Math.abs(2) // 2
Math.abs(3) // 3
Math.abs(-4) // 4
round[]
| Data type | function |
|---|---|
| Return type | number |
| Parameter list | x (number) |
| Standard | ECMA-262 §15.8.2.15 |
| Documentation | Mozilla, Microsoft |
Rounds the number to the nearest integer.
Math.round(12.3) // 12
Math.round(12.4999) // 12
Math.round(12.5) // 13
Math.round(12.6) // 13
If you want to round a number to a certain precision, such as for display as currency, you may wish to see Number.toFixed instead.
PI[]
| Data type | function |
|---|---|
| Return type | number |
| Parameter list | none |
| Standard | |
| Documentation | Mozilla |
Returns the number of pi (π).
Math.PI // 3.1415926