Question

How to add (append) an element to the end of an array in TypeScript

Answer 1

let arr:string[] = ["C", "C++", "JavaScript", "Java"];
  
arr.push("TypeScript"); 
 
console.log(arr);
  

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

 

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Answer 2

let arr:string[] = ["C", "C++", "JavaScript", "Java"];
  
arr[arr.length] = "TypeScript"; 
 
console.log(arr);
  

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

 

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Answer 3

let arr:string[] = ["C", "C++", "JavaScript", "Java"];
  
arr[7] = "TypeScript"; 
 
console.log(arr);
  
 
 
 
/*
run:
  
["C", "C++", "JavaScript", "Java", , , , "TypeScript"] 
  
*/
 
   

 

 

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