What a Program Is

A computer does exactly what it is told, very fast, and nothing else. A program is the telling: steps written down in order. This is a whole Kavach program:

print("Hello, Kavach!")
const year = 2026
print("Written in {year}")

Hello, Kavach!Written in 2026

Each line is one step. The first prints a greeting. The second gives the number 2026 a name, year. The third prints a sentence with that number inside it. The box under the code shows what the program printed when it ran.

From text to running program

1. You write the steps in a text file, the source code. Kavach files end in .kav, and are saved as UTF-8 text, as most editors save by default. The invisible mark some Windows editors put at the start of a file (a byte order mark) is fine: Kavach reads it as a space.
2. The compiler reads the file and checks it. If something is wrong, it tells you what, and where.
3. If all is well, it turns the file into instructions the processor runs directly.

You don't need to know how a processor works. You write the steps; Kavach checks them and makes them run.