Definitely unusable

Definitely unusable is a language that is supposed to be a derivative of Line Feed. Sadly, there is a bug in the implementation!^{_{PrySigneToFry maded Python implementation and it has no bug, even better than JS}}

Syntax

The only valid program is the single newline, which does nothing. Anything else will print out an error.

Implementations

Written in JavaScript:

function interpret(code) {
    if(code=='\n') {}
    else {
        console.log('Syntax Error:')
        // Uhhh...
        // How to print the contents of a variable?
        eval(code)
        // is that how you do it?
    }
}

Another implementation in Python

import sys
code = sys.stdin.read()
if code == "\n":
    pass
else:
    print(f"Syntax Error: {code}")

See also

• Line Feed