// write a function to count the occurrence of vowels in a string
#include <stdio.h>
#include<string.h>

int countVowels(char str[]);
int main() {
    char str[]="Hello World";
    printf("Vowels are : %d",countVowels(str));
    return 0;
}

int countVowels(char str[]){
    int count=0;
    
    for(int i=0; str[i] !='\0';i++){
        if(str[i] == 'a' || str[i] == 'e' || str[i] == 'i' || str[i] == 'o' ||
        str[i] == 'u'  || str[i] == 'A' || str[i] == 'E' || str[i] == 'I' 
        || str[i] == 'O' || str[i] == 'U'){
            count++;
        }
    }
    return count;
}