var defines a variable while let defines a constant.

There is no such major difference between them.

The value of a variable declared with var can be changed while the value of a variable declared with let cannot be changed.

var defined function scoped variable while let define block scoped variable.

integers

double precision floating point

double

floating point

Boolean

String

Number

Function

Display()

Prompt()

Alert()

Confirm()

Volatile variable

Mutable variable

Immutable variable

Dynamic variable

jscript.write("Sky is blue")

document.write("Sky is blue")

print("Sky is blue")

jscript.print("Sky is blue")

document. write()

console.log()

innerHTML

document.getElementById()

keyword

function

Declaration Statement

Data type

var

let

const

none of the above

document. write()

console.log()

window. alert()

innerHTML

Displays a message in an alert box

Prints output to the console

Writes data to a file

Logs an error in the browser console

//This is a comment

<!--This is a comment-->

/* This is a comment */

Both A and C

Long

Text

Integer

Number

<!--This is a comment-->

//This is a comment

'This is a comment

#This is a comment

5

10

55

error

parseInt ()

Number()

parseFloat()

valueOf()

Null type

Undefined type

Number type

All of the mentioned

var defines a variable while let defines a constant.

There is no such major difference between them

The value of variable declared with let cannot be changed

var define function scoped variable while let define block scoped variable

5myvalue

myvalue5

Myvalue

None of These

Division by zero

Missing of semicolons

Syntax error

Both A and B

variable carName;

var carName;

vari carName;

dim carName;

var

let

static

public