JavaScript Program to Find if a Character is a Vowel or Consonant

In this article, we will see different approaches to finding whether a character is a vowel or a consonant using JavaScript. We will check the condition of a character being Vowel and display the result.

Approaches to find if a character is a vowel or consonant

• Using conditional Statements
• Using JavaScript array and .include method
• Using Regular expression

Method 1: Using conditional statements

In this method, we will use if-else conditional statements to check if the letter is a vowel or not and display the output result.

Example: This example demonstrates the conditional statements for vowels and consonants.

Javascript

function checkChar(char){
    ch  = char.toLowerCase();
    if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u')
    return console.log("Given character is a Vowel");
    return console.log("Given character is a Consonent");
}


checkChar('G');
checkChar('A')

Output

Given character is a Consonent
Given character is a Vowel

Method 2: Using JavaScript array and Array .includes() method

In this method, we will use JavaScript array of vowels and use includes method to check if given character is present in the array then it is a vowel and consonant otherwise.

Example: In this example, we will check if vowels array includes the input cahracter or not.

Javascript

function checkChar(char){
    ch  = char.toLowerCase();
    const arr = ['a','e','i','o','u']
    if(arr.includes(ch))
    return console.log("Given character is a Vowel");
    return console.log("Given character is a Consonent");
}

checkChar('E');
checkChar('J');

Output

Given character is a Vowel
Given character is a Consonent

Method 3: Using JavaScript regular expression

In this method, we will create a regular expression for the vowels and test if the given input char satisfy the regex condition.

Example: In this example, we will implement regex for the vowels and output the result.

Javascript

function checkChar(char){
    ch  = char.toLowerCase();
    const regex = /^[aeiou]$/i;
    if(regex.test(ch))
    return console.log("Given character is a Vowel");
    return console.log("Given character is a Consonent");
}


checkChar('I');
checkChar('Z');

Output

Given character is a Vowel
Given character is a Consonent