WhileLoop

Runs the loop body as long as the condition stays True. Use carefully — an always-true condition hangs the game.

ForLoop

Runs the loop body a fixed number of times. Exposes the current index pin for use in the body.

PIE

Play In Editor — runs the game inside the editor process for fast iteration. Some systems behave differently in PIE vs Standalone.

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.

Sequence

Runs each output pin in order. Useful when you want multiple actions in a single tick without nesting.

DoN — execute N times then stop

Sprint system with stamina drain and recovery

Pattern: Variables bIsSprinting(bool), Stamina(float)=100, MaxStamina(float)=100, SprintSpeed(float)=1200, WalkSpeed(float)=600, DrainRate(float)=20, RecoverRate(float)=10. Sprint pressed: bIsSprinting=true → SetMaxWalkSpeed(SprintSpeed). Released: bIsSprinting=false → SetMaxWalkSpeed(WalkSpeed). Tick: Branch(bIsSprinting) → Stamina -= DrainRate*DT. Else: Stamina += RecoverRate*DT. Clamp(0, Max). If Stamina<=0 → force stop sprint.

Jump — make character jump

Jump — make character jump

ACharacter::Jump. Respects JumpZVelocity from CharacterMovement.

Dash or dodge movement with cooldown using timeline

Pattern: Variables bCanDash(bool)=true, DashDistance(float)=1000, DashDuration(float)=0.2. Input → Branch(bCanDash) → SET bCanDash=false → GetActorForwardVector → Multiply(Forward, DashDistance) → Timeline(0→1 over DashDuration) → Update: VLerp(StartLoc, StartLoc+DashOffset, Alpha) → SetActorLocation. Finished → Delay(CooldownTime) → SET bCanDash=true.