Building a Calculator

In this tutorial, we'll build a simple calculator that can perform basic arithmetic operations like addition, subtraction, multiplication, and division.

Step 1: Setting Up the Project

First, create a new TypeScript project by running the following command in your terminal:

npm init -y

Then, install the required dependencies:

npm install typescript --save-dev

Step 2: Creating the Calculator Function

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;
}

Step 3: Using the Calculator Function

To use the calculator function, create a new file called index.ts and add the following code:

import { add, subtract, multiply, divide } from './calculator';

console.log(add(2, 3));
console.log(subtract(5, 2));
console.log(multiply(4, 5));
console.log(divide(10, 2));