Small/Capital Letter Counter

#include<stdio.h>
int main()
{
    int sl=0, cl=0;
    char m = getchar();
    while(m!= '\n')
    {
        if(m>='a' && m<='z')
            sl++;
        else if(m>='A' && m<='Z')
            cl++;
        m = getchar();
    }
    printf("Small Letters: %d\nCapital Letters: %d",sl,cl);
    return 0;
}