049 - Accumulator Method Practice 5

Write a method header on line two with the following specs:

Returns: an integer Name: countVowels Parameters: a String called s Purpose: count the number of vowels in the string s. Assume s is all lowercase.

 

Examples:

• countVowels("obama") ==> 3
• countVowels("happy friday! i love weekends") ==> 9

---

Solution

class Main {
    public static int countVowels(String s)
    {
        char [] vowels = {'a','e','i','o','u'};
        s=s.toLowerCase();
        int cnt=0;
        for(int i=0;i<s.length();i++) {
            for(int j=0;j<vowels.length;j++) {
                if(s.charAt(i)==vowels[j]) {
                    cnt++;
                }
            }
        }
        return cnt;
    }
    
    
    //test case below (dont change):
    public static void main(String[] args){
        System.out.println(countVowels("obama")); //3
        System.out.println(countVowels("happy friday! i love weekends")); //9
    }
}