Question

How to add a new element at the end (append) of an array in JavaScript

Answer 1

let arr = ["C", "C++", "JavaScript", "Java"];
 
arr.push("PHP"); 

console.log(arr);
 


/*
run:
 
["C", "C++", "JavaScript", "Java", "PHP"]
 
*/
 

 

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Answer 2

let arr = ["C", "C++", "JavaScript", "Java"];
 
arr[arr.length] = "PHP"; 

console.log(arr);
 


/*
run:
 
["C", "C++", "JavaScript", "Java", "PHP"]
 
*/
 

 

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Answer 3

let arr = ["C", "C++", "JavaScript", "Java"];
 
arr[7] = "PHP"; 

console.log(arr);
 



/*
run:
 
["C", "C++", "JavaScript", "Java", undefined, undefined, undefined, "PHP"]
 
*/
 

 

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