Question

How to reverse a string in JavaScript

Answer 1

function ReverseString(s) {
    let rev = '';
   
    for (let i = s.length - 1; i >= 0; i--)
        rev += s[i];
         
    return rev;
}

let s = "JavaScript C C++ C# Java";
 
console.log(ReverseString(s));
 

 
/*
run:  
 
avaJ #C ++C C tpircSavaJ
 
*/

 

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Answer 2

function ReverseString(s) {
    let rev = [];
    
    for (let i = 0, len = s.length; i <= len; i++)
        rev.push(s.charAt(len - i));
    
    return rev.join('');
}

let s = "JavaScript C C++ C# Java";
 
console.log(ReverseString(s));
 

 
/*
run:  
 
avaJ #C ++C C tpircSavaJ
 
*/

 

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with the most comprehensive set of 13 hands-on online Python courses
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Answer 3

function ReverseString(s) {
    return s.split('').reverse().join('');
}

let s = "JavaScript C C++ C# Java";
 
console.log(ReverseString(s));
 

 
/*
run:  
 
avaJ #C ++C C tpircSavaJ
 
*/

 

Learn & Practice Python
with the most comprehensive set of 13 hands-on online Python courses
Start now

Answer 4

function ReverseString(s) {
    for (let i = s.length - 1, rev = ''; i >= 0; rev += s[i--]) { }
    
    return rev;
}

let s = "JavaScript C C++ C# Java";
 
console.log(ReverseString(s));
 

 
/*
run:  
 
avaJ #C ++C C tpircSavaJ
 
*/

 

Learn & Practice Python
with the most comprehensive set of 13 hands-on online Python courses
Start now

Answer 5

function ReverseString(s) {
    s = s.split('');
    let len = s.length;
    let middle = Math.floor(len / 2) - 1;
     
    for (let i = 0; i <= middle; i++) {
        let tmp = s[len - i - 1];
        s[len - i - 1] = s[i];
        s[i] = tmp;
    }
    
    return s.join('');
}

let s = "JavaScript C C++ C# Java";
 
console.log(ReverseString(s));
 

 
/*
run:  
 
avaJ #C ++C C tpircSavaJ
 
*/

 

Learn & Practice Python
with the most comprehensive set of 13 hands-on online Python courses
Start now

Answer 6

function ReverseString(s) {
  return [...s].reverse().join('');
}
 
let s = "JavaScript C C++ C# Java";
  
console.log(ReverseString(s));
  
 
  
/*
run:  
  
avaJ #C ++C C tpircSavaJ
  
*/
 

 

Learn & Practice Python
with the most comprehensive set of 13 hands-on online Python courses
Start now