if(lang == "C#" || lang == "Java" || lang == "C++"){
   know = true;
}
else if(lang == 'SQL' or lang == 'SQLServer' or lang == 'MySQL') {
   set know = true
}
else if(lang == "VB") {
   know = true
}
else{
   know = false;
   LearnTheLangFromWebFunction();
}