Built-in objects: Math

The Math object contains lots of math-related utilities.

It provides us a lot of properties and functions that we can use to perform calculations.

## Properties

• `Math.E` e, base of the natural logarithm (means ~2.71828)
• `Math.LN10` represents the base e (natural) logarithm of 10
• `Math.LN2` represents the base e (natural) logarithm of 2
• `Math.LOG10E` represents the base 10 logarithm of e
• `Math.LOG2E` represents the base 2 logarithm of e
• `Math.PI` the π constant (~3.14159)
• `Math.SQRT1_2` represents the reciprocal of the square root of 2
• `Math.SQRT2` represents the square root of 2

## Methods

All those methods are static.

### Math.abs()

Returns the absolute value of a number

``````Math.abs(2.5) //2.5
Math.abs(-2.5) //2.5
``````

### Math.acos()

Returns the arccosine of the operand

The operand must be between -1 and 1

``````Math.acos(0.8) //0.6435011087932843
``````

### Math.asin()

Returns the arcsine of the operand

The operand must be between -1 and 1

``````Math.asin(0.8) //0.9272952180016123
``````

### Math.atan()

Returns the arctangent of the operand

``````Math.atan(30) //1.5374753309166493
``````

### Math.atan2()

Returns the arctangent of the quotient of its arguments.

``````Math.atan2(30, 20) //0.982793723247329
``````

### Math.ceil()

Rounds a number up

``````Math.ceil(2.5) //3
Math.ceil(2) //2
Math.ceil(2.1) //3
Math.ceil(2.99999) //3
``````

### Math.cos()

Return the cosine of an angle expressed in radiants

``````Math.cos(0) //1
Math.cos(Math.PI) //-1
``````

### Math.exp()

Return the value of Math.E multiplied per the exponent that’s passed as argument

``````Math.exp(1) //2.718281828459045
Math.exp(2) //7.38905609893065
Math.exp(5) //148.4131591025766
``````

### Math.floor()

Rounds a number down

``````Math.floor(2.5) //2
Math.floor(2) //2
Math.floor(2.1) //2
Math.floor(2.99999) //2
``````

### Math.log()

Return the base e (natural) logarithm of a number

``````Math.log(10) //2.302585092994046
Math.log(Math.E) //1
``````

### Math.max()

Return the highest number in the set of numbers passed

``````Math.max(1,2,3,4,5) //5
Math.max(1) //1
``````

### Math.min()

Return the smallest number in the set of numbers passed

``````Math.max(1,2,3,4,5) //1
Math.max(1) //1
``````

### Math.pow()

Return the first argument raised to the second argument

``````Math.pow(1, 2) //1
Math.pow(2, 1) //2
Math.pow(2, 2) //4
Math.pow(2, 4) //16
``````

### Math.random()

Returns a pseudorandom number between 0.0 and 1.0

``````Math.random() //0.9318168241227056
Math.random() //0.35268950194094395
``````

### Math.round()

Rounds a number to the nearest integer

``````Math.round(1.2) //1
Math.round(1.6) //2
``````

### Math.sin()

Calculates the sin of an angle expressed in radiants

``````Math.sin(0) //0
Math.sin(Math.PI) //1.2246467991473532e-16)
``````

### Math.sqrt()

Return the square root of the argument

``````Math.sqrt(4) //2
Math.sqrt(16) //4
Math.sqrt(5) //2.23606797749979
``````

### Math.tan()

Calculates the tangent of an angle expressed in radiants

``````Math.tan(0) //0
Math.tan(Math.PI) //-1.2246467991473532e-16
``````

#### Lessons in this unit:

 0: Introduction 1: The global object 2: Object properties 3: Number 4: String 5: ▶︎ Math 6: JSON 7: Date 8: Intl 9: Set and Map