C – Functions – Vowel Count

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A string is passed as input. The program must print the count of vowels. Fill in the lines to implement the function countVowels.

Boundary Condition(s):
1 <= Length of String <= 1000

Input Format:
The first line contains N.
The next N lines contain a string in each line.

Output Format:
The first N lines contain the strings in sorted order.

Example Input/Output 1:
Input:
hello

Output:
2

Example Input/Output 2:
Input:
editable

Output:
4

#include <stdio.h>

int isVowel(char c){
    return c=='a' || c=='e'|| c=='i' || c=='o' || c=='u';
}
int countVowels(char s[1001]){
    int c=0;
    for(int i=0;i<strlen(s);i++){
        if(isVowel(tolower(s[i])))
        c++;
    }
    return c;
}

int main()
{
    char str[1001];
    scanf("%s", str);
    printf("%d", countVowels(str));
}