JS | Count vowel from a String

Logic: First of all we will write a variable that will contain a count of vowels, we will make it initialize it with 0. The main think , We can make a string of all vowels like ‘aeiou’ then we an use includes method with each character as argument to check the string (string of vowels) contain the character or not, if it’s true then we can mark the character as a vowel and we will increment our count variable

Program :

const vowel =  (str) => {  
  
  count = 0;
  
  for(char of str) {    
    if('aeiou'.includes(char)) {
      count++;
    }
  }
  return count;
}
console.log(vowel('hello world')) //3

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