C programming: How to check whether the input string contains combination of uppercase and lowercase

Question

I\'m totally newbie here. As stated above, I would like to know how to check whether the input string contains combination of uppercase and lowercase. After that print a stateme

Answer 1

unsigned int len = strlen(inputStr);
bool containsUpperCase = false;
bool containsLowerCase = false;

for (int i = 0; i < len && !(containsUpperCase && containsLowerCase); ++i)
{
    char c = inputStr[i];
    if (c >= 'A' && c <= 'Z')
        containsUpperCase = true;
    else  if (c >= 'a' && c <= 'z'))
        containsLowerCase = true;
}

printf("Contains Upper Case: %d Contains Lower Case: %d\n",
       containsUpperCase, containsLowerCase);