Error:MethodError: no method matching getindex(::typeof(LCSlength), ::Int64)

[ffevotte]

Welcome to discourse. Please avoid posting screenshots of your code: it will be easier for us to help you if we can copy-paste your buggy code to try and improve it.

See below for some instructions about how to correctly quote source code here:

PSA: how to quote code with backticks

This is a short post on using backticks (` and ```) to quote code, with the intention of benefiting users who are confused by this feature of the site. The intention is to make it linkable when necessary. Why By quoting your code, you get a monospaced font (which preserves indentation) and syntax highlighting. This helps people who read your code and want to help you. Displayed code looks like this: function displayed_code(x::Int, y::Int) if x < y println("x is smaller") else …

As for your problem, I can’t see very well (yet another problem with screenshots), but isn’t the x in your 5th line lowercase when it should be uppercase?