18 – Best C program to count vowels and consonants in a string

#include<stdio.h>
//itvoyagers.in
int main()
{
    char msg[]="ITVoyagers - Let's sail across an ocean of IT";
    int i, v=0, c=0, s=0, sc=0, l=sizeof(msg)/sizeof(char);
    for(i=0; i<l-1; i++)
    {
        if(msg[i]=='a' || msg[i]=='e' || msg[i]=='i' || msg[i]=='o' || msg[i]=='u' || 
        msg[i]=='A' || msg[i]=='E' || msg[i]=='I' || msg[i]=='O' || msg[i]=='U')
        {
            v++;
        }
//itvoyagers.in
        else if((msg[i]>='a' && msg[i]<='z') || (msg[i]>='A' && msg[i]<='Z'))
        {
            c++;
        }
        else if(msg[i]==' ')
        {
            s++;
        }
        else
        {
            sc++;
        }
//itvoyagers.in
    }
    printf("nCount of Vowels : %d",v);
    printf("nCount of consonant : %d",c);
    printf("nCount of Spaces : %d",s);
    printf("nCount of Special characters : %d",sc);
}