Learn ASCII with Easy Examples in Python and JavaScript

What is ASCII?

ASCII (American Standard Code for Information Interchange) is a character encoding system used to represent text in computers using numbers.

Each character—such as letters (A–Z, a–z), digits (0–9), and symbols (@, #, etc.)—is assigned a unique numeric value called an ASCII value.

Example

• 'A' → 65


• 'a' → 97


• '1' → 49


• '@' → 64

Why ASCII is Important

• Helps computers store and process text


• Used in programming and string manipulation


• Foundation for modern encoding systems like Unicode

JavaScript

let name = "[email protected]";



for (let i = 0; i < name.length; i++) {

    console.log(name[i] + " : " + name.charCodeAt(i));

}

How it works

• name[i] -> gets the character


• name.charCodeAt(i) -> gets ASCII value of that character

Python

name = "[email protected]"



for ch in name:

    print(ch, ":", ord(ch))

How it works

• for ch in name → loops through each character


• ord(ch) → gives ASCII value of that character

Output