The simplest Mythryl conditional expression is ... ?? ... :: ... which corresponds exactly to the C ... ? ... : ... conditional expression:
linux$ my
eval: 1 == 1 ?? "red" :: "green"
"red"
eval: 1 == 2 ?? "red" :: "green"
"green"
Unlike in C or Perl, Mythryl boolean expressions must evaluate to TRUE or FALSE; Mythryl does not allow you to use integer zero to mean FALSE nor integer one to mean TRUE.