Step 1 — Select Grammar

• Click the Start button to begin the simulation.
• Choose the predefined grammar from the list.

Step 2 — View the NPDA and Test with Samples

• Review the NPDA details on the left under “Review the NPDA.”
• Test with sample inputs under the “Test with Samples” section.

Step 3 — View the selected grammar NPDA visualization

• Scroll to the NPDA Visualization section to see the state diagram.
• Use the zoom and pan controls to explore the graph.
• Inspect start/accept states and ε-transitions to understand how the NPDA processes inputs.

Step 4 — Step-by-Step NPDA (Run and Stack Visualization)

• Enter an input (e.g., ab) and click Run Simulation.
• Use Play to auto-run or Step to move through each configuration.
• Watch the table as you step:
  • Action (transition taken)
  • State (current state)
  • Remaining (unread input)
  • Stack (bottom → top)
  • Note (rule/explanation)
• In Stack Animation, observe pushes/pops and confirm acceptance on the final step.