Question

I am not from cs background and I am trying to make sense of what is used for what. In pseudocode I see a lot of this: ``` for i <--- 1 to n-1 do j <--- find-Min(A,i,n) A[j] <-> A[i] end for ``` What are `<---` and `<->` used to refer to?

Accepted Answer

`<---` means "assign the right-hand side to the left-hand side" (it is somewhat strange to see this used in the `for` case, as it might easily have been omitted there).

`<->` means "swap". A[j] value is swapped with A[i].

EDIT:

It just occurred to me that the first line might be missing `i` and should instead read:

```
for i <---  1 to n-1 do
```

This becomes a legitimate use case of `<---` described above: `i` is assigned values from `1` to `n-1` sequentially, and the loop body (down to `end for`, which denotes the end of loop) is executed for each of these `i` values.

<--- and <-> in pseudocode

Solution

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