I have two string arrays: one with date and another with temperature. Both arrays are huge.

Ex: dateValues array has elements like: 2023-07-01T00:00, 2023-07-01T01:00,….
temperatureValues has elements like: 38.4, 29.2,….
I want to combine both and it should look like this:

2023-07-01T00:00,38.4
2023-07-01T01:00,29.2
.....

I want to write combined array to a csv file.
Tried chain command

 for (x, y) in zip(dateValues, temperatureValues) {
        let val = x + "," + y + "n"
        try csvValues(val)
    }
    print(csvValues)

I get error on the try line: Cannot call value of non-function type ‘[String]’. How to fix this?