Variable not in scope
sara_n (2)

For every piece of code that I wrote, I get ''variable not in scope''. (for example :
length1 :: [a] -> Int
length1 l | l==[] =0
| otherwise = 1 + length1 tail l
some of the other solutions i tried are written by my teaher.

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sara_n (2)

@ThatSmart I was told i didnt need a main function, and all of the code I tried works without it. duzina means length so I dont see the problem in adding 1 to it. I wanted to write my own function for determining the length of an array.