JavaScript: Area of Circle

Enter Radius

Area will be shown here

JavaScript Code

function calculateArea() {
  let radius = parseFloat(document.getElementById("radiusInput").value);
  if (isNaN(radius)) {
    alert("Please enter a valid radius!");
    document.getElementById("result").innerText = "Invalid radius!";
    console.log("Invalid input");
    return;
  }
  let pi = 3.14;
  let area = pi * radius * radius;
  let output = "Area of circle is: " + area.toFixed(2);
  document.getElementById("result").innerText = output;
  alert(output);
  console.log(output);
}