Learn Gremlin - 10 Code Examples & CST Typing Practice Test

Gremlin is a graph traversal language and virtual machine used across the Apache TinkerPop graph computing framework. It supports imperative and functional traversal steps to query, analyze, and mutate property graph data across both OLTP and OLAP graph systems.

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Basic Gremlin Traversals Add Vertex and Edge Filter by Property Count Vertices Shortest Path Traversal Group By Property Order Vertices Limit Traversal Results Remove Vertex Traversal with Both Directions

Learn GREMLIN with Real Code Examples

Updated Nov 18, 2025

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Code Sample Descriptions

Basic Gremlin Traversals

g.V().has("person", "name", "Alice")
    .out("knows")
    .values("name")

Traversing a graph to find friends of a person using Gremlin.

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Add Vertex and Edge

g.addV("person").property("name", "Alice")
.addV("person").property("name", "Bob")
.addE("knows").from(g.V().has("name","Alice")).to(g.V().has("name","Bob"))

Adding vertices and an edge between them in Gremlin.

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Filter by Property

g.V().hasLabel("person").has("age", gt(30)).values("name")

Finding people older than 30 in a Gremlin graph.

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Count Vertices

g.V().count()

Counting the number of vertices in the graph.

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Shortest Path Traversal

g.V().has("person","name","Alice")
    .repeat(out().simplePath()).until(has("person","name","Bob"))
    .path()

Finding a simple path between two people.

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Group By Property

g.V().hasLabel("person")
    .group().by("city")
    .next()

Grouping people by their city property.

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Order Vertices

g.V().hasLabel("person")
    .order().by("age", decr)
    .values("name","age")

Ordering people by age in descending order.

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Limit Traversal Results

g.V().hasLabel("person").limit(5).values("name")

Limiting the traversal to return only 5 people.

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Remove Vertex

g.V().has("person","name","Alice").drop()

Deleting a vertex with a given property.

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Traversal with Both Directions

g.V().has("person","name","Alice")
    .both("knows")
    .values("name")

Finding all friends connected in both directions.

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Frequently Asked Questions about Gremlin

What is Gremlin?

What are the primary use cases for Gremlin?

Multi-hop graph traversals. Pattern search across large graphs. Fraud ring analysis. Network and IT topology mapping. Recommendation engines. Knowledge graph pipelines

What are the strengths of Gremlin?

Database-agnostic-works on many graph engines. Very expressive traversal capabilities. Can handle highly complex multi-hop patterns. Supports distributed analytics (OLAP). Deep control of traversal logic

What are the limitations of Gremlin?

Less beginner-friendly than Cypher. Syntax can become long and verbose. Requires graph theory understanding. Performance varies by underlying graph system

How can I practice Gremlin typing speed?

CodeSpeedTest offers 10+ real Gremlin code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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Learn Gremlin - 10 Code Examples & CST Typing Practice Test

Code Sample Descriptions

Basic Gremlin Traversals

g.V().has("person", "name", "Alice")
    .out("knows")
    .values("name")

Traversing a graph to find friends of a person using Gremlin.

Let’s Try →

Add Vertex and Edge

g.addV("person").property("name", "Alice")
.addV("person").property("name", "Bob")
.addE("knows").from(g.V().has("name","Alice")).to(g.V().has("name","Bob"))

Adding vertices and an edge between them in Gremlin.

Let’s Try →

Filter by Property

g.V().hasLabel("person").has("age", gt(30)).values("name")

Finding people older than 30 in a Gremlin graph.

Let’s Try →

Count Vertices

g.V().count()

Counting the number of vertices in the graph.

Let’s Try →

Shortest Path Traversal

g.V().has("person","name","Alice")
    .repeat(out().simplePath()).until(has("person","name","Bob"))
    .path()

Finding a simple path between two people.

Let’s Try →

Group By Property

g.V().hasLabel("person")
    .group().by("city")
    .next()

Grouping people by their city property.

Let’s Try →

Order Vertices

g.V().hasLabel("person")
    .order().by("age", decr)
    .values("name","age")

Ordering people by age in descending order.

Let’s Try →

Limit Traversal Results

g.V().hasLabel("person").limit(5).values("name")

Limiting the traversal to return only 5 people.

Let’s Try →

Remove Vertex

g.V().has("person","name","Alice").drop()

Deleting a vertex with a given property.

Let’s Try →

Traversal with Both Directions

g.V().has("person","name","Alice")
    .both("knows")
    .values("name")

Finding all friends connected in both directions.

Let’s Try →

Frequently Asked Questions about Gremlin

What is Gremlin?

What are the primary use cases for Gremlin?

Multi-hop graph traversals. Pattern search across large graphs. Fraud ring analysis. Network and IT topology mapping. Recommendation engines. Knowledge graph pipelines

What are the strengths of Gremlin?

What are the limitations of Gremlin?

Less beginner-friendly than Cypher. Syntax can become long and verbose. Requires graph theory understanding. Performance varies by underlying graph system

How can I practice Gremlin typing speed?

CodeSpeedTest offers 10+ real Gremlin code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.