Numbers

Number is the primary numeric type in JavaScript. Number value consists of both integers and real numbers.

// Integers
23
34171
0
-45
-98172

// Real numbers
1.57
-0.871

In programming languages like Java, they have separate data types to handle integers and real numbers.

64 Bit

Any number in JavaScript is represented using 64 bits floating point format. That means any number in JavaScript takes 64 bit of memory. As an example, number 6 is stored in memory as shown below:

0000000000000000000000000000000000000000000000000000000000000110

Since we have 64 bits, the largest numbers which can be represented are ±1.7976931348623157 × 10308. And the smallest number that can be represented are ±5 × 10−324.