> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/p/pascals_triangle.md).

# Pascal's triangle

```ruby
func pascal(rows) {
    var row = [1]
    { | n|
        say row.join(' ')
        row = [1, {|i| row[i] + row[i+1] }.map(0 .. n-2)..., 1]
    } << 1..rows
}
 
pascal(10)
```