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Learn NetLogo
What is NetLogo? Tutorial #0 Sample Model Tutorial #1 Models Tutorial #2 Commands Tutorial #3 Procedures
Documentation
NetLogo Dictionary Interface Guide Interface Tab Guide Info Tab Guide Code Tab Guide Programming Guide Transition Guide Preferences Guide Version History
Advanced Tools
Extension Manager Shapes Editor BehaviorSpace System Dynamics HubNet HubNet Authoring Logging Controlling Mathematica Link NetLogo 3D NetLogoLab Cluster Computing (HPC)
Extensions
Extensions Guide Arduino Array Bitmap CSV GIS GoGo LevelSpace Matrix Networks Palette Profiler Python Resource Rnd Sound Simple R Table Time Vid View2.5D
FAQ
Home
Learn NetLogo
What is NetLogo? Tutorial #0 Sample Model Tutorial #1 Models Tutorial #2 Commands Tutorial #3 Procedures
Documentation
NetLogo Dictionary Interface Guide Interface Tab Guide Info Tab Guide Code Tab Guide Programming Guide Transition Guide Preferences Guide Version History
Advanced Tools
Extension Manager Shapes Editor BehaviorSpace System Dynamics HubNet HubNet Authoring Logging Controlling Mathematica Link NetLogo 3D NetLogoLab Cluster Computing (HPC)
Extensions
Extensions Guide Arduino Array Bitmap CSV GIS GoGo LevelSpace Matrix Networks Palette Profiler Python Resource Rnd Sound Simple R Table Time Vid View2.5D
FAQ
primitive: length
NetLogo Dictionary
  • No items found

length 1.0

length list

length string

Reports the number of items in the given list, or the number of characters in the given string.

Take me to the full NetLogo Dictionary.

NetLogo Dictionary: left

Documentation for the left primitive.

NetLogo Dictionary: let

Documentation for the let primitive.

NetLogo is a programmable modeling environment for simulating natural and social phenomena. It was authored by Uri Wilensky in 1999 and has been in continuous development ever since at the Center for Connected Learning and Computer-Based Modeling.

Related Links
  • NetLogo Home
  • CCL Home
  • NetLogo Web
  • NetTango Web
  • NetLogo 3D
  • BehaviorSearch
  • Contact Us

Copyright © 1999-2026 Uri Wilensky and the Center for Connected Learning and Computer-Based Modeling at Northwestern University . All rights reserved.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License , or (at your option) any later version.

Commercial licenses are also available. To inquire about commercial licenses, please contact Uri Wilensky at [email protected] .

For more information, visit the NetLogo website .