Question

How to find the type of a variable in JavaScript

Answer 1

const n = 30;

console.log(typeof(n));



 
/*
run:
 
"number"
 
*/

 

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Answer 2

const n = 3.14;

console.log(typeof(n));



 
/*
run:
 
"number"
 
*/

 

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Answer 3

const s = "javascript";

console.log(typeof(s));



 
/*
run:
 
"string"
 
*/

 

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Answer 4

const b = false;

console.log(typeof(b));



 
/*
run:
 
"boolean"
 
*/

 

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Answer 5

const arr = ["java", "javascript", "c"];  

console.log(typeof(arr));



 
/*
run:
 
"object"
 
*/

 

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Answer 6

const arr = [1, 2, 3];  

console.log(typeof(arr));



 
/*
run:
 
"object"
 
*/

 

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Answer 7

const obj = {name:'Tom', age:47};  

console.log(typeof(obj));



 
/*
run:
 
"object"
 
*/

 

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Answer 8

let v;

console.log(typeof(v));



 
/*
run:
 
"undefined"
 
*/

 

70+ SQL courses for beginners and professionals