{{keywords>wiki library source code example reference}}
===== toupper ======
<code c>
    #include <ctype.h>
    int toupper( int char );
</code>
    Returns upper case type of the character

===== C Sourcecode Example =====
<code c>
#include <stdio.h> /* including standard library */
//#include <windows.h> /* uncomment this for Windows */

#include <ctype.h>

int main ( void )
{
  char string[30];
  /* write the Chars "i" and "t" uppercase in the buffer "string" */
  sprintf(string,"%c whant %chis in uppercase",toupper('i'), toupper('t'));
  printf("%s\n",string);

return 0;
}
</code>
==== output ====
    output:
    user@host:~$ ./toupper 
    I whant This in uppercase