Building a Simple TypeScript Calculator

Calculator Project

In this tutorial, we will build a simple calculator using TypeScript.

Step 1: Create a New TypeScript Project

Create a new folder for your project and navigate to it in your terminal. Then, run the following command to create a new TypeScript project:

tsc --init

Step 2: Define Calculator Functions

Create a new file called calculator.ts and add the following code:

function add(x: number, y: number): number {
  return x + y;
}
function subtract(x: number, y: number): number {
  return x - y;
}
function multiply(x: number, y: number): number {
  return x * y;
}
function divide(x: number, y: number): number {
  if (y === 0) {
    throw new Error('Cannot divide by zero');
  }
  return x / y;
}

This code defines four functions for basic arithmetic operations.

Step 3: Create a Calculator Class

Add the following code to the calculator.ts file:

class Calculator {
  add(x: number, y: number): number {
    return x + y;
  }
  subtract(x: number, y: number): number {
    return x - y;
  }
  multiply(x: number, y: number): number {
    return x * y;
  }
  divide(x: number, y: number): number {
    if (y === 0) {
      throw new Error('Cannot divide by zero');
    }
    return x / y;
  }
}

This code defines a Calculator class with methods for basic arithmetic operations.

Step 4: Use the Calculator

Create a new file called main.ts and add the following code:

const calculator = new Calculator();
console.log(calculator.add(2, 3));
console.log(calculator.subtract(5, 2));
console.log(calculator.multiply(4, 5));
console.log(calculator.divide(10, 2));

This code creates a new Calculator object and uses its methods to perform arithmetic operations.