print vowels in a string javascript code example
Example 1: count vowels in javascript
const vowels = ['a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'];
function countVowels(sentence) {
let counts = 0;
for(let i = 0; i < vowels.length; i++) {
if(vowels.includes(sentence[i])) {
counts++;
}
}
return console.log(counts);
}
countVowels('Hello World');
countVowels('AaEeIiOoUu');
countVowels('aaaaa');
Example 2: vowels consonants javascript
function readLetter() {
return prompt("Type a letter: ");
}
function isVowel(character) {
switch (character) {
case "a":
case "A":
case "e":
case "E":
case "i":
case "I":
case "o":
case "O":
case "u":
case "U":
return true;
default:
return false;
}
}
var letter = readLetter();
if (isVowel(letter)) alert("The letter is a vowel.");
else alert("The letter is consonant.");
Example 3: count vowels in a string javascript
const countVowels = (str) => (str.match(/[aeiou]/gi) || []).length
Example 4: find vowels in string javascript
var name = userInput[0];
var count =0;
function findvowel(name)
{
var vowel = ['a','e','i','o','u','A','E','I','O','U'];
for(i=0;i<name.length;i++)
{
if(vowel.includes(name[i]))
{
count++;
}
}
return count;
}
console.log(findvowel(name));