Linked List Algorithms - Digit Addition

Add Two Numbers

Add Two Numbers walks two reverse-order digit lists together, creates one output digit per step, and carries overflow into the next node.

Two Digit Streams

The upper chain represents l1 and l2 as alternating digit nodes for a compact simulation.

Carry survives between nodes, so each step depends on the previous sum.

A new result node is appended for each computed digit.

When one list ends, the other list and carry still continue.

List valuesSelected value

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Linked List Algorithms - Digit Addition

Add Two Numbers walks two reverse-order digit lists together, creates one output digit per step, and carries overflow into the next node.

The upper chain represents l1 and l2 as alternating digit nodes for a compact simulation.

Carry survives between nodes, so each step depends on the previous sum.

A new result node is appended for each computed digit.

When one list ends, the other list and carry still continue.

List valuesSelected value