find the area of a circle in typescript

To find the area of a circle in TypeScript, you need to use the formula: πr^2, where r is the radius of the circle and π is a mathematical constant approximately equal to 3.14. Here is an example code block in TypeScript that calculates the area of a circle:

index.ts
const calculateCircleArea = (radius: number): number => {
  const pi = 3.14;
  const area = pi * (radius ** 2);
  return area;
}

// Example usage
const circleArea = calculateCircleArea(5);
console.log(`The area of a circle with a radius of 5 is ${circleArea}`);
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In this code, the calculateCircleArea function takes in a radius parameter and calculates the area using the formula. The pi constant is defined as 3.14 and then used in the formula. Lastly, the function returns the calculated area. The console.log statement demonstrates an example usage by calling the calculateCircleArea function with a radius of 5 and displaying the resulting area.