How To Define Area in Switch Case in JavaScript

let area = "circle";
    let PI = 3.142,
      l = 9,
      b = 7,
      r = 6;
    switch (area) {
      case "circle":
        console.log("Area of the circle is : " + PI * r ** 2);
        break;
      case "triangle":
        console.log("Area of the triangle is : " + (l * b) / 2);
        break;
      case "rectangle":
        break;
        console.log("Area of the rectangle is : " + l * b);
      default:
        console.log("please enter valid data");
    }
    

Area of the circle is : 113.112