//Data type in JS

/* There are two type of data types

1.premetive(imutable))

2.non premetive(mutable)*/

// only "object" is the data type

let a=2;

let b=3;

console.log(typeof a); //javas Know itself the type of variable we can find it by (typeof)

console.log (2+3);

console.log(a+b);

//number is premetive

//symbol is premetive

console.log("***************************************************************************************")

console.log(2+3-4*6/7); //if follow the BODMAS rule

console.log("***************************************************************************************")

console.log(2+3-4*6/7%2); // if same the modulus same as python

console.log("***************************************************************************************")

let str="abcd"; //everything in between "" is sttring

let string=""; //empty string

console.log("***************************************************************************************")

console.log(str[0]); //finding index

console.log(str[4]); //if not a present undified

console.log(typeof str); //datatype finding

//string is imutable

//trivercing is possible in strings

//floor

//non-decimal value is floor

//example:4.999=4

//in case of negative it is totally opposite

//cell

//non-decimal value is floor

//example:4.999=5

//in case of negative it is totally opposite

//going to the bigger value

//round value

//logic of normal maths rounding off the value

//example:4.4=4, 4.6=5

//in case of negative it is totally opposite

//going to bigger ND Smaller value according to condition

console.log(Math.max(1,2,3,4,5,6,7,8,9)) //time complexity of same

console.log(Math.min(1,2,3,4,5,6,7,8,9)) //just to easy code

console.log("***************************************************************************************")

console.log("abcd".includes("c")); //checking true or false while present or not

console.log("abcd".indexOf("c")); //indexOF sortcut to find directly

console.log("***************************************************************************************")

console.log("abc"+"def")

console.log("***************************************************************************************")

let w="abc";

console.log(w+"def")

console.log("***************************************************************************************")

let name="Arun";

let rolno=99;

console.log("My name is "+ name + ".\nmy rollno is"+rolno + "."); //proper way to add using +

console.log(`My name is ${name}. My rollno is ${rolno}.`); // use ${} to reduse time it is basically used as f string in python

console.log("***************************************************************************************")

let k=true;

let l=false;

console.log(typeof k); //to express boolean Type

console.log("***************************************************************************************")

let g;

console.log(typeof g); //type exists as undified

console.log("***************************************************************************************")

let j=null;

console.log(typeof j); // sep

console.log("***************************************************************************************")

/* premetive datatype

number

bigint

boolean

undefined

symbol

null*/

console.log("***************************************************************************************")

//if and else

//AND &&

//OR ||

if (a%2==0){

console.log("True")

}

else

{

console.log("False")

}

console.log("***************************************************************************************")

z="ram"

y="singh"

console.log(z+" "+y)

/*output

number

5

5

***************************************************************************************

1.5714285714285716

***************************************************************************************

3.5714285714285716

***************************************************************************************

***************************************************************************************

a

undefined

string

9

1

***************************************************************************************

true

2

***************************************************************************************

abcdef

***************************************************************************************

abcdef

***************************************************************************************

My name is Arun.

my rollno is99.

My name is Arun. My rollno is 99.

***************************************************************************************

boolean

***************************************************************************************

undefined

***************************************************************************************

object

***************************************************************************************

***************************************************************************************

True

***************************************************************************************

ram singh*/