Aapka Pehla JavaScript Program

Aap jo bhi JavaScript program likhoge usme console.log() ka use baar baar hoga — yahi hai jisse aapka code aapse baat karta hai. Chaliye dekhte hain ki yeh exactly kya karta hai, phir ek real program run karte hain.

console.log() function

console.log() jo bhi aap parentheses ke andar likhoge use console par print kar deta hai. Text (jise programming mein "string" kehte hain) quotes ke andar hona chahiye — single ('), double ("), ya backticks (`) sab chalte hain, bas consistent rehna hoga.

Comments

// ke baad line mein jo bhi likha ho woh comment hota hai — JavaScript use completely ignore kar deta hai. Comments sirf insaano ke padhne ke liye hote hain, yeh samjhane ke liye ki kuch is tarah kyun likha gaya hai.

Khud run karke dekho

Yeh raha ek chhota program jisme ek comment aur do console.log() calls hain. Neeche dikha output actually execute karke nikala gaya hai — text change karke khud bhi example ke neeche button se run karke dekho.

// This is a comment - JavaScript ignores it
console.log("Hello, World!");
console.log("Welcome to JavaScript.");

Hello, World!
Welcome to JavaScript.

Notice karo, har console.log() call apne aap ek nayi line se start hota hai — yeh iska default behavior hai.

Aage: variables — values ko actually store aur reuse kaise karein, sirf fixed text print karne ke bajaye.