UKismetMathLibrary::Conv_Int64ToByte

function Engine Blueprint Since 5.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPureBlueprintAutocast

Description

Converts a 64-bit integer to a byte (uint8) by keeping only the low 8 bits. Values larger than 255 wrap around silently.

Caveats & Gotchas

• Truncation is silent — if InInt is 256 the result is 0, if it is 257 the result is 1. There is no out-of-range warning in Blueprint or C++. Always clamp the value first if overflow would be a bug: UKismetMathLibrary::Clamp64(InInt, 0, 255).
• Negative int64 values produce non-zero bytes due to two's-complement representation (e.g. -1 → 255). If the source can be negative, clamp or abs before converting.

Signature

static UE_INL_API uint8 Conv_Int64ToByte(int64 InInt)

Parameters

Name	Type	Description	Default
InInt	int64	The 64-bit integer to truncate to a byte.	—

Return Type

uint8

Example

Safe clamped conversion C++

int64 BigIndex = GetSomeIndex64();
// Clamp before converting to avoid silent truncation
int64 Clamped = FMath::Clamp<int64>(BigIndex, 0, 255);
uint8 ByteValue = UKismetMathLibrary::Conv_Int64ToByte(Clamped);

Version History

Introduced in: 5.0

Version	Status	Notes
5.6	stable	—

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