😐 Data Types

• Primtives are immutable values, passed & compared by value. There are 7 types 🌈 of them.
• In JS, when math/logical operations are done on different types, they are coerced to PRIMITIVE (first default, then number, then string
• Number : stored in 64 bit double precision.
• Bigint: stored in arbitrary precision. For Integers ≥ 2^53 -1 (15 digits)
• Boolean: Represent a logical entity and can be true /false. Falsy values :  0, '', NaN , null undefined
• Null: Shows something that does not exist. Has only one value: null. It's Primitive even if typeof null == 'Object'
• Undefined: initial value of variables, params, non-existant properties
• String: a set of UTF-16 characters (16-bit unsigned integer (0-65536))
• Symbol: a primitive type for unique identifiers. No literal form

🥀 Numbers

NaN: a special number that represents indeterminate number , like operations with Infinity, undefined

NaN =/= NaN

-Infinity +Infinity : uncomputable numbers like 0 division

Number Formats : 0o33; 0xff; 0b11; 0.255e1

BigInts

• Uses 64 bits, where 63rd is signed, 62-52 store coefficient and rest store power