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+{{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

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