UKismetMathLibrary::RandomBool
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticBlueprintPureNotBlueprintThreadSafe
Description
Returns a uniformly distributed random boolean — roughly 50/50 true or false on each call. Uses the engine's global random stream, which is not reproducible across runs unless the seed is set.
Caveats & Gotchas
- • Marked NotBlueprintThreadSafe — do not call from Blueprint async nodes or C++ parallel-for loops; use RandomBoolWithWeightFromStream with a per-thread FRandomStream instead.
- • The underlying global RNG is shared across the engine; other systems (physics, AI, etc.) consuming random numbers will shift the sequence and alter results if call order changes.
Signature
static UE_INL_API bool RandomBool();Return Type
bool Example
Randomly flip a coin at game start C++
bool bHeads = UKismetMathLibrary::RandomBool();
UE_LOG(LogGame, Log, TEXT("Coin flip: %s"), bHeads ? TEXT("Heads") : TEXT("Tails"));Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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