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JavaScript Math: Main Tips
- The
Mathobject in JavaScript is for performing mathematical calculations. - This object has properties and methods for getting mathematical constants. It also has operations that are time-consuming to manually write in expressions.
Use of the Math Object: Easy Functions to Learn
The JavaScript Math object should not be mistaken for a constructor. It accepts Number type but won't work with BigInt.
For instance, Math.min JavaScript will present you with the lowest value:
Another method is the Math.floor in JavaScript, delivering a value rounded downwards to the closest integer.
JavaScript also offers another function called Math.round() for rounding values upwards to the closest integer:
You can get the square root of a specific number without having to open a separate calculator. To get JavaScript square root, you should apply the Math.sqrt() function.
Here is a short example, illustrating how you can make JavaScript count square root of 100:
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List of Object Properties
One important thing to note is that the Math object does not have a constructor. However, it has static properties.
| Property | Description |
|---|---|
| E | Return Euler's number (approximately 2.718). |
| LN2 | Return natural logarithm of 2 (approximately 0.693). |
| LN10 | Return natural logarithm of 10 (approximately 2.302). |
| LOG2E | Return base-2 logarithm of E (approximately 1.442). |
| LOG10E | Return base-10 logarithm of E (approximately 0.434). |
| PI | Return PI (approximately 3.1416). |
| SQRT1_2 | Return square root of 1/2 (approximately 0.707). |
| SQRT2 | Return square root of 2 (approximately 1.414). |
Tip: you can call these properties and functions below by applying Math as the object instead of creating it.
Functions to Apply
Here is a cheat-sheet, containing all methods for more successful and quick calculations.
Note: results of most of these functions depend on browsers, operating systems and architectures used.
| Method | Description |
|---|---|
| abs(x) | Return absolute value of x. |
| acos(x) | Return arccosine of x in radians. |
| asin(x) | Return arcsine of x in radians. |
| atan(x) | Return arctangent of x as numeric value between -PI/2 and PI/2 radians. |
| atan2(y,x) | Return arctangent of quotient of its arguments. |
| ceil(x) | Return x rounded upwards to the nearest integer. |
| cos(x) | Return cosine of x (x is in radians). |
| exp(x) | Return value of Ex. |
| floor(x) | Return x rounded downwards to the nearest integer. |
| log(x) | Return natural logarithm (base E) of x. |
| max(x,y,z,...,n) | Return number with the highest value. |
| min(x,y,z,...,n) | Return number with the lowest value. |
| pow(x,y) | Return value of x to power of y. |
| random() | Return a random number between 0 to 1. |
| round(x) | Round x to the nearest integer. |
| sin(x) | Return sine of x (x is in radians). |
| sqrt(x) | Return square root of x. |
| tan(x) | Return tangent of angle. |
Remember: sin(), cos(), tan(), asin(), acos(), atan(), atan2() functions return or should be used with angles in radians. For conversion from radians to degrees, you should divide by Math.PI / 180. To perform the opposite, multiply instead of dividing.
