Number

An number value.

A Number is a numeric value that is an integer or a rational number. Numbers are stored in multiple bytes in floating point format. This is so that numbers with a fractional portion can have precise calculations perfomed on them.

Some examples of different types of number values:

67 - positive integer
-345 - negative integer
0 - zero
19.43 - floating point
-45.245 - negative floating point
0.4567 - fractional floating point
8.23e+21 - floating point with exponent notation

Declare a number variable

You can assign a number to a variable:

let num = 42

Arithmetic operators

The following arithmetic operators work on numbers and return a Number:

addition: 1 + 3
subtraction: 1 - 3
multiplication: 3 * 2
integer division: 7 / 3
modulo is available through the math library

Relational operators

The following relational operators work on numbers and return a Boolean:

equality: (3 + 1) = 4
inequality: 3 != 4
less or equal than: 3 <= 4
less than: 3 < 4
greater or equal than : 4 >= 3
greater than: 4 > 3

Functions that return a number

Some functions return a number, which you can store in a variable.

let abs = Math.abs(-42)

Math functions

The math library includes math related functions. For example, the min function returns the minimum value of two input parameters x and y:

let lowest = Math.min(-42, 1000)