Only false and nil are false. 0 and "" are true.

Goal

Print comparisons for Nairobi units.

local units = 12
print(units >= 10)
print(units == 12)

print(true and false)
print(true or false)
print(not false)

print(not not 0)
print(not not "")
print(not not nil)

local city = "Kisumu"
print(city == "Nairobi" and "capital" or "other")