AWK is a domain-specific language designed for text processing. It is available on all Unix-like systems.

How to test

Prerequisites: AWK (pre-installed on all Unix/Linux/macOS systems)

awk -f fibonacci.awk

Expected output:

0
1
1
2
3
5
8
13
21
34

Source Code

BEGIN {
    a = 0
    b = 1
    for (i = 0; i < 10; i++) {
        print a
        c = a + b
        a = b
        b = c
    }
}

Local Testing Screenshot Image