UKismetMathLibrary::Multiply_Int64Int64
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticBlueprintPure
Description
Multiplies two 64-bit integers and returns a 64-bit result (A * B). Use when int32 would overflow for large counts or timestamps.
Caveats & Gotchas
- • There is no 128-bit intermediate result — overflow wraps silently in two's complement. When multiplying two large int64 values the product can overflow; consider clamping or checking magnitude before multiplying.
- • Blueprint integer64 support was limited in early UE5 versions; if targeting UE 4.x the int64 Blueprint nodes may not be available on all platforms. Test on your minimum-supported version.
Signature
static UE_INL_API int64 Multiply_Int64Int64(int64 A, int64 B);Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| A | int64 | First multiplicand. | — |
| B | int64 | Second multiplicand. | — |
Return Type
int64 Example
Compute byte size from large counts C++
int64 TotalBytes = UKismetMathLibrary::Multiply_Int64Int64(NumRecords, static_cast<int64>(RecordSize));Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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