UKismetMathLibrary::Conv_IntToInt64

function Engine Blueprint Since 4.22

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticUFUNCTIONBlueprintPure

Description

Widens a 32-bit integer to a 64-bit integer. Used as a Blueprint autocast when an Integer pin connects to an Integer64 input, and useful in C++ to avoid mixed-width arithmetic warnings.

Caveats & Gotchas

• Sign extension is performed correctly — negative int32 values produce the corresponding negative int64 value, not a large positive number. If your logic assumes the result is always non-negative, add an explicit check.
• Blueprint Integer64 nodes became fully supported in UE 4.22. In earlier engine versions this autocast did not exist and int64 manipulation required custom C++ nodes. If you maintain cross-version code, guard usage accordingly.

Signature

static UE_INL_API int64 Conv_IntToInt64(int32 InInt);

Parameters

Name	Type	Description	Default
InInt	int32	The 32-bit integer to widen.	—

Return Type

int64

Example

Safe multiplication avoiding int32 overflow C++

int32 ItemCount = GetItemCount();
int32 ItemPrice = GetItemPriceInCents();
int64 TotalCents = UKismetMathLibrary::Conv_IntToInt64(ItemCount)
                 * UKismetMathLibrary::Conv_IntToInt64(ItemPrice);

Version History

Introduced in: 4.22

Version	Status	Notes
5.6	stable	—

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