Test a Value
Try: "hello", 42, 0, null, undefined, NaN, "", []
Enter a value and click "Test" to see the result
Quick Test: The 6 Falsy Values
Click any button to test these falsy values:
Quick Test: Surprising Truthy Values
These look falsy but are actually truthy!
Robot ID Card Variables
See how HAP's new variables behave:
nickname = "" FALSY Empty string — no nickname set backupBattery = 0 FALSY Zero — no backup power secondaryMission = null FALSY Null — intentionally empty energyLevel = 100 TRUTHY Non-zero number — has power! robotName = "HyBit A. ProtoBot" TRUTHY Non-empty string — has a name