UKismetMathLibrary::EqualEqual_DoubleDouble
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintPure
Description
Returns true if A is exactly equal to B (A == B). Performs a bitwise IEEE 754 equality check with no tolerance.
Caveats & Gotchas
- • Exact floating-point equality is almost never reliable for computed values — two calculations that are mathematically identical can produce different bit patterns due to rounding. Use NearlyEqual_FloatFloat for calculated results.
- • This node is safe for comparing constants or values that were never computed (e.g., checking if a result is exactly 0.0 after an integer cast to double), but dangerous for anything derived from arithmetic.
Signature
static UE_INL_API bool EqualEqual_DoubleDouble(double A, double B);Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| A | double | The first value to compare. | — |
| B | double | The second value to compare. | — |
Return Type
bool Example
Check if a timer resets to exactly zero C++
// Only safe because 0.0 is an exact IEEE 754 value
if (UKismetMathLibrary::EqualEqual_DoubleDouble(TimerValue, 0.0))
{
OnTimerReset();
}Tags
Version History
Introduced in: 5.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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