Javascript Tutorial Development Tutorials, Guides & Insights

• == performs type coercion.
• === ensures both value and type match.

• Logical operators evaluate left to right; ensure your conditions are correct.

   const PI = 3.1416;
   let radius = 5;
   let area = PI * radius ** 2;
   console.log("Area:", area); // Area: 78.54

   let number = 7;
   if (number % 2 === 0) {
     console.log(number + " is even.");
   } else {
     console.log(number + " is odd."); // Outputs: 7 is odd.
   }

Example:

let car = { make: "Toyota", model: "Corolla", year: 2020 };
car.color = "blue";
console.log(car);

let colors = ["red", "green", "blue"];
colors.push("yellow");
colors.shift();
console.log(colors);

const sum = (a, b) => a + b;
console.log(sum(10, 15)); // 25

Example:

let name = "Alice";
let age = 25;
let isStudent = true;

console.log(typeof name); // string
console.log(typeof age); // number
console.log(typeof isStudent); // boolean

• Use const for constants or variables that should remain unchanged.
• Example:

     const API_KEY = "12345";
     // API_KEY = "67890"; // Error: Assignment to constant variable