Example: Determine whether a character is digit

public static int main (string[] args) {
unichar[] chars = {'a', 'Ω', '0', '9',
'一', '二', '零','九'};

// Output: ``false false true true false false false false``
foreach (unichar c in chars) {
print ("%s ", c.isdigit ().to_string ());
}
print ("\n");
return 0;
}

 valac --pkg glib-2.0 unichar.isdigit.vala

See: