Linked Lists — Free DSA Tutorial
Learn Linked Lists in DSA with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Linked Lists in DSA with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Linked Lists in DSA
A linked list stores each element in a node that also holds a pointer to the next node. Unlike arrays, the elements are not contiguous, so there is no O(1) index access — reaching the k-th node takes O(k). The payoff is O(1) insertion/deletion at a known node (just re-wire pointers), with no shifting.
The fast/slow pointer trick (Floyd's algorithm) is a famous linked-list pattern: move one pointer one step and another two steps. It detects a cycle (they meet) and finds the middle node (when fast reaches the end, slow is at the middle).
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