28. JavaScript Numbers

In modern JavaScript, there are two types of numbers:
1. Regular numbers in JavaScript are stored in 64-bit format IEEE-754;
2. BigInt numbers, to represent integers of arbitrary length.

This video plan:
- How to write a number
- Hex, binary and octal numbers
- toString()
- Rounding
- Imprecise calculations
- Parse number

How to write a number:
1.23e6 === 1.23 * 1000000
1.23e-6 === 1.23 / 1000000 === 0.00000123

Hex, binary and octal numbers:
hex: 0xff === 0xFF === 255
octal: 0o377 === 255
binary: 0b11111111 === 255

toString():
255..toString(2) == 0b11111111
255..toString(16) == ff

Rounding:
removes anything after the decimal point without rounding: 3.1 becomes 3, -1.1 becomes -1.

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