cstringlowercase

How do I lowercase a string in C?

How can I convert a mixed case string to a lowercase string in C?

Solution

  • It's in the standard library, and that's the most straight forward way I can see to implement such a function. So yes, just loop through the string and convert each character to lowercase.

    Something trivial like this:

    #include <ctype.h>

for(int i = 0; str[i]; i++){
  str[i] = tolower(str[i]);
}

    or if you prefer one liners, then you can use this one by J.F. Sebastian:

    for ( ; *p; ++p) *p = tolower(*p);