notes-questions.txt

Immutable Type / Value Type

Variables those store Value.

a) number - (0-9) , Decimal , Infinity (Error Value) , NaN (Error Value)
Helper Methods isNaN, isFinite, parseInt, parseFloat

b) String 
“”
‘’
``
`A is ${a}` String Interpolation ES6 (2015)
String Methods

c) boolean - true (1) , false (0)


Object Type / Reference Type / Mutable Type
a) Array
b) Object
c) Function

Var x = [10,20];
Var y = x;
y[0] = 1000;

Var a = 10;
Var b = a;
B = b + 20



Q1. Why dot use with Value Type?
Q2. What is null value and where we use it? Hint : typeof
Q3. Typeof ?
Q4. Null vs undefined
Q5 . == vs ===
Q6. Prime Number Compute Function
Q7. ArmStrong Number Compute Function
Q8. add() - 0
add(10) - 10
add(10,20) - 30
add(10,”20”) - 30
add(10,”ten”) - 10
add(10, NaN) - 10
add(10, 20, 30 ,40, 50)- 150


Chromium —> Chrome Canary —> Chrome
JavaScript Modern Name (ES)
ECMA Script
Operator (**) Exponent (ES8 (2017))
Automatic TypeCasting
String + Number = String
Number + String  = String
Number - String = Number