Error Lab

Every diagnostic below is the real output of ptc, not a mock-up. Pick a mistake, read how the compiler teaches the canonical form, then flip to the fix.

let count = 5
if count:
    print("yes")

error: condition must be Bool, found Int — POLYTONE has no truthiness; write an explicit comparison (line 2, column 4)

let count = 5
if count > 0:
    print("yes")

yes