Index of element in the same array

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1

Hello,
I want to get the index of a string in array of strings. I want to use this index later on with the same array of strings to check if condition. I used array_of_string(index_of_array_of_string) but I got error of index range although I am sure that the index is in the bound of indexes of the array

2

which statement was used to calculate the index?

3

Array.IndexOf(Roulage, “kg”)
Roulage is array of string

4

looks good
grafik
now next recommendation is to debug the flow and watching the variables and its value

5

It gives me the index … but when I use it inside the same array to get another variable ( using this index+1 for example) it gives me an error

6

keep in mind the array indexes are 0 based - 0 first element
do you know the no of elements from array, the index which is used?

7

I think that the problem I can’t use the index of array in the same array but i don’t know how to resolve it