Beware of very clever people who are slightly bored

O NOES

HAI
CAN HAS STDIO?
I HAS A VAR
GIMMEH VAR
IZ VAR BIGGER THAN 10 O RLY?
     YA RLY
          BTW this is true
          VISIBLE "BIG NUMBER!"
     NO WAI
          BTW this is false
          VISIBLE "LITTLE NUMBER!"
     KTHX
KTHXBYE

(Via Peeve Farm.)

Addendum: See also Whitespace.

(Via Chizumatic.)