unless

output

------
UNLESS
------
A2
B1
C1
D1
------
IF
------
A2
B1
C1
D1

unless.rb

puts "------"
puts "UNLESS"
puts "------"

unless true && true
  puts "A1"
else
  puts "A2"
end

unless false && true
  puts "B1"
else
  puts "B2"
end


unless true && false
  puts "C1"
else
  puts "C2"
end

unless false && false
  puts "D1"
else
  puts "D2"
end

puts "------"
puts "IF"
puts "------"

if !(true && true)
  puts "A1"
else
  puts "A2"
end

if !(false && true)
  puts "B1"
else
  puts "B2"
end


if !(true && false)
  puts "C1"
else
  puts "C2"
end

if !(false && false)
  puts "D1"
else
  puts "D2"
end