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Pushdown Automata Simulator

Model and simulate Pushdown Automata to understand context-free languages. Define states, input and stack alphabets, transition rules, and observe the computation with stack operations visualized in real-time.

Input String

Input Tape

a
a
b
b
Current State: q0
Position: 0

Stack Visualization

Z
Stack Bottom
Stack Top

Simulation Controls

800ms

Execution Trace