javascript-exercises/Exercise12.html at master · DanyST/javascript-exercises · GitHub

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<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title>Exercise 12</title>
        <meta name="description" content="">
        <meta name="viewport" content="width=device-width, initial-scale=1">
    </head>
    <body>
        <script type="text/javascript">
            //Crear un programa que reciba una letra e indique si es vocal o consonante.

            let letter = prompt('Ingrese una letra');

            function vocalOrConsonantLetter(letterParam) {
                let letter = letterParam.toLowerCase();
                let result;

                if (isNaN(letterParam)){
                     switch (letter) {
                        case 'a':
                        case 'e':
                        case 'i':
                        case 'o':
                        case 'u':
                            result = `${letterParam} es letra vocal`;
                            break;
                        default:
                            result = `${letterParam} es letra consonante`;
                            break;
                        }
                }else {
                   result = `${letterParam} no es una letra`;
                }
                return result;
            }

            alert(vocalOrConsonantLetter(letter))
        </script>
    </body>
</html>