🚀 JavaScript Basic Syntax Examples

JavaScript is one of the most popular programming languages in the world.
Here are some basic syntax examples that every beginner should know.

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1. Variable Declarations

let name = "Usama";
let age = 22;
let isStudent = true;
let job = null;
let hobbies = ["reading", "gaming", "coding"];
let address = {
  street: "123 Main St",
  city: "Anytown",
  country: "Pakistan",
};

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2. Function Declaration

function greet() {
  console.log(`Hello, my name is ${name} and I am ${age} years old.`);
}

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3. Conditional Statement

if (isStudent) {
  console.log("I am a student.");
} else {
  console.log("I am not a student.");
}

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4. Loop Example

for (let i = 0; i < hobbies.length; i++) {
  console.log(`Hobby ${i + 1}: ${hobbies[i]}`);
}

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5. Object Method

function displayAddress() {
  console.log(
    `I live at ${address.street}, ${address.city}, ${address.country}.`
  );
}

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6. Arrow Function

const add = (a, b) => a + b;

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7. Template Literals

const message = `My name is ${name} and I am ${age} years old.
I enjoy ${hobbies.join(", ")}.`;
console.log(message);

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8. Destructuring Assignment

const { street, city, country } = address;
console.log(`Address: ${street}, ${city}, ${country}`);

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9. Spread Operator

const newHobbies = [...hobbies, "traveling", "photography"];
console.log("Updated hobbies:", newHobbies);

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10. Rest Parameter

function sum(...numbers) {
  return numbers.reduce((acc, num) => acc + num, 0);
}
console.log("Sum of numbers:", sum(1, 2, 3, 4, 5));

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11. Default Parameters

function multiply(a, b = 1) {
  return a * b;
}
console.log("Multiplication result:", multiply(5)); // b defaults to 1

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12. For...of Loop

for (const hobby of hobbies) {
  console.log(`Hobby: ${hobby}`);
}

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13. For...in Loop

for (const key in address) {
  console.log(`${key}: ${address[key]}`);
}

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✅ Summary

In this example, we covered:

• Variables (let, const)
• Functions & Arrow Functions
• Conditionals (if/else)
• Loops (for, for...of, for...in)
• Objects & Methods
• Template Literals, Spread, Rest, Default Parameters

This is a beginner-friendly overview of JavaScript’s basic syntax. 🚀