Nothing shows up

//The quiz begins, no correct answers
var correct = 0;

// Questions begin
var answer1 = prompt("What is a programming language that's is also a gem?");
if (answer1.toUpperCase() === "RUBY") {
  correct += 1;
}

var answer2 = prompt("Name a programming language that's also a snake?");
if (answer2.toUpperCase === "PYTHON"){
  correct += 1;
}

var answer3 = prompt("What programming language do you use to style a web page?");
if (answer3.toUpperCase. === "CSS"){
  correct += 1;
}

var answer4 = prompt("What programming language do you use to make the structure of a web page?");
if (answer4.toUpperCase === "HTML") {
  correct += 1;
}

var answer5 = prompt("What programming do you use to add interactivity to a web page?");
if (answer5.toUpperCase === "JAVASCRIPT") {
  correct += 1;
}

//Results
document.write("<p>You got " + correct + "out of 5 correct.</p>");

//Rank
if (correct === 5) {
  document.write("<p><strong>You earned a gold crown!</strong></p>");
}
else if (correct >= 3) {
  document.write("<p><strong>You won a silver crown.</strong></p>");
}
else if (correct >= 1) {
  document.write("<p><strong>You won a bronze crown.</strong></p>");
}
else if {
  document.write("<strong><p>You won nothing. You need to study more");
}```