print(nil != nil); # expect: false

print(true != true); # expect: false
print(true != false); # expect: true

print(1 != 1); # expect: false
print(1 != 2); # expect: true

print("str" != "str"); # expect: false
print("str" != "ing"); # expect: true

print(nil != false); # expect: true
print(false != 0); # expect: true
print(0 != "0"); # expect: true