UKismetMathLibrary::Conv_Int64ToDouble

function Engine Blueprint Since 5.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPureBlueprintAutocast

Description

Converts a 64-bit integer to a double-precision float. Useful when performing floating-point arithmetic on large integer values.

Caveats & Gotchas

• Precision loss occurs for large int64 values. A double has 53 bits of mantissa, so integers larger than 2^53 (about 9 quadrillion) cannot be represented exactly. Converting and converting back may not yield the original value.
• This is a BlueprintAutocast, meaning Blueprint will insert it silently when you connect an Integer64 pin to a Float pin. Be aware of the implicit precision loss if the source integer is very large.

Signature

static UE_INL_API double Conv_Int64ToDouble(int64 InInt)

Parameters

Name	Type	Description	Default
InInt	int64	The 64-bit integer to convert to a double.	—

Return Type

double

Example

Computing a fractional progress from large counters C++

int64 Processed = GetProcessedItems();
int64 Total = GetTotalItems();
double Progress = UKismetMathLibrary::Conv_Int64ToDouble(Processed)
    / UKismetMathLibrary::Conv_Int64ToDouble(Total);

Version History

Introduced in: 5.0

Version	Status	Notes
5.6	stable	—

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