UKismetMathLibrary::NotEqual_BoolBool

function Engine Blueprint Since 4.0

#include "Kismet/KismetMathLibrary.h"

Access: public Specifiers: staticBlueprintPure

Description

Returns true if the two boolean values are not equal — i.e., one is true and the other is false. This is the Blueprint '!=' operator for booleans and is mathematically equivalent to XOR.

Caveats & Gotchas

• NotEqual_BoolBool and BooleanXOR produce identical results for boolean inputs. They exist as separate nodes for Blueprint readability — use whichever conveys intent more clearly in the graph.
• In C++ use '!=' or '^' directly; this function exists primarily for Blueprint graph exposure.

Signature

static UE_INL_API bool NotEqual_BoolBool(bool A, bool B);

Parameters

Name	Type	Description	Default
A	bool	First boolean operand.	—
B	bool	Second boolean operand.	—

Return Type

bool

Example

Detect when two states diverge C++

if (UKismetMathLibrary::NotEqual_BoolBool(bWasVisible, bIsVisible))
{
    OnVisibilityChanged();
}

Version History

Introduced in: 4.0

Version	Status	Notes
5.6	stable	—

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