Advanced-JavaScript-With-Projects/if_elseIf_else.html at main · marleyDip/Advanced-JavaScript-With-Projects · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>If Condition</title>
  </head>
  <body></body>

  <script>
    let num1 = Number(prompt("Enter the value"));
    if (num1 % 2 == 0) {
      console.log(num1, "Even Number");
    } else {
      console.log(num1, "Odd number");
    }

    let score = Number(prompt("Enter The Value"));
    if (score < 0 && score > 100) {
      console.log("Invalid Formate. Score Must be in 0 - 100");
    } else if (score >= 90) {
      console.log("Grade A");
    } else if (score >= 80) {
      console.log("Grade B");
    } else if (score >= 70) {
      console.log("Grade C");
    } else if (score >= 60) {
      console.log("Grade D");
    } else {
      console.log("Grade F");
    }

    let age = Number(prompt("Enter the Age"));

    if (age >= 0 && age <= 2) {
      console.log("Infant", age);
    } else if (age >= 3 && age <= 5) {
      console.log("Toddler", age);
    } else if (age >= 6 && age <= 12) {
      console.log("Child", age);
    } else if (age >= 12 && age <= 17) {
      console.log("Teenager", age);
    } else if (age < 0) {
      console.log("Invalid..Age must be greater than 0", age);
    } else {
      console.log("Adult", age);
    }

    let voting = Number(prompt("Enter The Age"));

    if (voting >= 18) {
      console.log("Eligible for Voting", voting);
    } else {
      console.log("Invalid age for voting", voting);
    }

    let trafficLight = prompt("Enter traffic light color").toLowerCase().trim();

    if (trafficLight === "red") {
      console.log("Stop! The light is red");
    } else if (trafficLight === "yellow") {
      console.log("Get ready to Stop!");
    } else if (trafficLight === "green") {
      console.log("Go! The light is green");
    } else {
      console.log("Invalid input. Please enter red, yellow, green ");
    }

    let year = Number(prompt("Enter the given year"));

    if ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0) {
      console.log("This is Leap Year", year);
    } else {
      console.log("This is not valid leap year", year);
    }
  </script>
</html>