strupr() function in C String converts all the characters present in a given string to Uppercase.
The strupr() 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.
strupr(string_name);
C Program for strupr() 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("Uppercase Characters: %s", strupr(str)); return 0; } |
Output:
Original String: SimplE2code.Com
Uppercase Characters: SIMPLE2CODE.COM
Don’t be alarmed if it does not run on your compiler. It is just that some functions like strupr(), which are only available in ANSI C (Turbo C/C++) and are not available in the standard C-GCC compiler.