UKismetMathLibrary::RandomInteger64InRange

function Engine Blueprint Since unknown

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Returns a uniformly distributed random int64 between Min and Max, inclusive on both ends. Use when you need a closed range rather than a half-open one.

Caveats & Gotchas

• Marked NotBlueprintThreadSafe — do not call from async Blueprint tasks or background worker threads. Use a FRandomStream instance for deterministic or thread-local randomness.
• If Min > Max, the result is undefined. Always ensure the bounds are ordered correctly; swap them if they come from user-controlled data.

Signature

static UE_INL_API int64 RandomInteger64InRange(int64 Min, int64 Max);

Parameters

Name	Type	Description	Default
Min	int64	Inclusive lower bound.	—
Max	int64	Inclusive upper bound.	—

Return Type

int64

Example

Generate a random Unix timestamp within a date window C++

int64 StartEpoch = 1700000000LL; // ~Nov 2023
int64 EndEpoch   = 1800000000LL; // ~Jan 2027
int64 RandomTime = UKismetMathLibrary::RandomInteger64InRange(StartEpoch, EndEpoch);

Version History

Introduced in: unknown

Version	Status	Notes
5.6	stable	—

Feedback

Was this helpful?