What are the unique features of Javascript ?

Question

for example every variable declaration starts with
var VariableName

It doesn't matter whether its a integer , string , float etc...
What are such unique features of Javascript or are such examples found in other languages too. ? Answer please..

Answer 1

this is a simple example for you.
https://code.sololearn.com/WWEXY300jnp0/?ref=app

Answer 2

if.. else.. statement
try.. catch..
do.. while.. loop
while.. loop

Answer 3

@Chinmay Moghe

try... catch... is a block code where it will check a block of code inside try{.....} , when the code inside try{....} is error, catch(Exception e){....} will work to show a code inside it.

example:

try {
alert("abcd" ++ "qwerty");
}
catch(Exception e) {
alert("error");
}

this code made to prevent an error in console.

Answer 4

if else , while loop are not unique to javascript.
what is try ..catch ? I dunno .

Answer 5

JavaScript is a prototype-based language.