JavaScript: Find the first not repeated character

Last update on August 19 2022 21:51:52 (UTC/GMT +8 hours)

JavaScript Function: Exercise-23 with Solution

Write a JavaScript function to find the first not repeated character.

Sample arguments : 'abacddbec'
Expected output : 'e'

Pictorial Presentation:

JavaScript: Find the first not repeated character

Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>find the first not repeated character.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function find_FirstNotRepeatedChar(str) {
  var arra1 = str.split('');
  var result = '';
  var ctr = 0;
 
  for (var x = 0; x < arra1.length; x++) {
    ctr = 0;
 
    for (var y = 0; y < arra1.length; y++) 
    {
      if (arra1[x] === arra1[y]) {
        ctr+= 1;
      }
    }
 
    if (ctr < 2) {
      result = arra1[x];
      break;
    }
  }
  return result;
}
console.log(find_FirstNotRepeatedChar('abacddbec'));

Sample Output:

Flowchart:

Live Demo:

See the Pen JavaScript - Find the first not repeated character-function-ex- 23 by w3resource (@w3resource) on CodePen.

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