Specific character count in string

March 13, 2022

So guys, I want to make a specific character counter, f.g. in word Specific we have 2 "i". Where am I wrong?

function countChar(word, char) {
  var count = 0
  for (let i = 0; i <= word.lenght; i++) {
    if (word[i] === `${char}`) {
      count += 1
    }
  }
  return count;
}
console.log(countChar("BBC","B"));
//0
//undefined

>Solution :

Hi and welcome to stackoverflow!

You have two problems in your code:

typo word.length instead of word.lenght
word[i] instead of string[i] in the comparison

So, your code works when you use

<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'>
function countChar(word, char) {
  var count = 0
  for (let i = 0; i <= word.length; i++) {
    if (word[i] === `${char}`) {
      count += 1
    }
  }
  return count;
}
alert (countChar("BBC","B"));
</script>
</head>
<body>
</body>
</html>

Please use a debugger, like the ones that are contained in every modern browser in the future ;-).