strlwr() function in C String converts all the characters present in a given string to Lowercase.
The strlwr() function is defined in the header file string.h.
It takes a single argument that is the name of the string and is written as follows.
strlwr(string_name);
C Program for strlwr() function
1 2 3 4 5 6 7 8 9 10 11 12 | #include <stdio.h> #include <string.h> int main() { char str[20] = "SIMple2CODe.CoM"; printf("Original String: %s", str); printf("Lowercasing all the Characters: %s", strlwr(str)); return 0; } |
Output:
Don’t be alarmed if it does not run on your compiler. It is just that some functions like strlwr(), which are only available in ANSI C (Turbo C/C++) and are not available in the standard C-GCC compiler.