In the build of basic code, warning: control reaches end of non-void function

[Robert Nash]

My compiler returns 0 errors and 1 warning, for the following code.

The warning is
warning: control reaches end of non-void function

what does this mean?

CODE
#include <stdio.h>

int main()
{
if ( 11 < 10) {
printf( "Five is now less than ten, that's a big surprise" );
}
else {
printf( "11 is now not less than ten, that's a big surprise" );
}
}

Many thanks

[donbock]

You told the compiler that main returns an int value, but the function ends without a return statement. What int value should the compiler return?

The error message tells it all -- control reached the end (that is, the closing brace) of a non-void function (that is, a function that is supposed to return a value).

[Robert Nash]

Thank you. Your help is much appreciated. As you can see, I'm starting to learn programming from the very start!