How to return random float concat_StrStr using C++?

[Rumzie]

KISMET_MATH_FORCEINLINE
float UKismetMathLibrary::RandomFloat()
{
	return FMath::FRand();
}

This is your whole function

UniqueNumber = FString::SanitizeFloat(FMath::FRand()) + FString::SanitizeFloat(FMath::FRand())