Blah

Blah is a very funny esolang that doesn't even make sense, created by User:None1.

Execution

Blah has no input.

If the code is exactly ^, print 20 ^'s

If the code is exactly v, print 20 v's

If the code is exactly <, print 20 <'s

If the code is exactly >, print 20 >'s

If the code is not any of them, print 20 Blah!'s

Implementations

Python

import sys
l=list("<>^v")
code=sys.stdin.read()
if code in l:
    print(code*20)
else:
    print("Blah!"*20)

C

#include<stdio.h>
int main(){
    char a,b;
    a=getchar();
    b=getchar();
    if(b==EOF&&(a=='^'||a=='v'||a=='<'||a=='>')){
        for(int i=1;i<=20;i++) putchar(a);
        return 0;
    }
    for(int i=1;i<=20;i++) printf("Blah!");
    return 0;
}

Example Programs

code:

^

output:

^^^^^^^^^^^^^^^^^^^^

Quine

Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!Blah!

This is obviously the only quine in Blah, no proof is needed.