Statements

A statement is a single instruction the JavaScript engine can execute. For example:

console.log("Hello, World!");

Statements can declare variables, call functions, or perform calculations.

Semicolons

Semicolons end statements. JavaScript can sometimes insert them for you, but adding them explicitly is best practice.

let age = 18;

You can also place multiple statements on the same line if you separate them with semicolons:

let x = 10;
let y = 20;
console.log(x + y);

Whitespace

Whitespace is any space, tab, or blank line in your code. JavaScript ignores extra whitespace, letting you format code for readability. These are identical in functionality:

let name = "Shyam"; // best practice

This is why consistent whitespace matters:

• Makes code easier for humans to scan
• Avoids confusion in teamwork
• Follows industry style guides

Therefore, remove any extra whitespaces from code and make it more readable:

let name = "Shyam"; 
let name = "Shyam"; 

Line Breaks

JavaScript separates statements using line breaks, but automatic semicolon insertion can sometimes cause mistakes. Always using semicolons is safer:

If you leave out semicolons, JavaScript might still work thanks to automatic semicolon insertion, but it's riskier:

let score = 42;
console.log(score);

This can lead to unexpected behavior, especially in complex code. Always using semicolons is safer and clearer.