Loop with no exit condition — will hang the game

Why: Function '{fn}' contains a ForLoop or WhileLoop whose condition is never reached or whose body never updates the counter. The game will freeze when this code runs. Fix: If WhileLoop: ensure the body modifies the condition variable so eventually the condition becomes false. If ForLoop: check the Index range — Last Index must be >= First Index. Add a Print String of the index inside the loop body so you can see if it's actually iterating.

WhileLoop — loop while condition is true

Macro. WARNING: can cause infinite loop if condition never becomes false.

Select (float) — choose between two floats based on bool condition

Pure node. bPickA=true returns A, bPickA=false returns B. Works for any type.

Health system: take damage, clamp health, check death

Pattern: EventAnyDamage → Subtract_FloatFloat(A=CurrentHealth, B=Damage) → Clamp(Value=Result, Min=0, Max=MaxHealth) → SetVariable(Health=ClampResult) → Branch(Condition=(Health <= 0)) → True: call OnDeath custom event. Variables needed: Health (float), MaxHealth (float). EventAnyDamage output pin is 'Damage' (float). Clamp inputs: 'Value', 'Min', 'Max'. All floats.

string

string

BooleanAND — logical AND

OR=BooleanOR, NOT=Not_PreBool, XOR=BooleanXOR

Create a Blueprint for a health pickup that restores health when overlapped by the player

Less (float) — A < B

Health and damage system with ApplyDamage and EventAnyDamage

Dealing damage: Event → ApplyDamage(TargetActor, BaseDamage, InstigatorController, DamageCauser, DamageTypeClass). Receiving: EventAnyDamage → Damage output → Subtract_FloatFloat(CurrentHealth, Damage) → FClamp(Result, 0, MaxHealth) → SET CurrentHealth → Branch(CurrentHealth <= 0) → True: DestroyActor. Initialize CurrentHealth=MaxHealth in BeginPlay.

AND Boolean — logical AND of two booleans