Code :

a!forEach(

items: enumerate(5) + 1,

expression: joinarray(

a!forEach(

items: enumerate(fv!item) + 1,

expression: fv!item

),

" "

)

)

enumerate(5) → {0, 1, 2, 3, 4}

+ 1 → {1, 2, 3, 4, 5}

So the outer loop runs 5 times, with:

fv!item = 1, 2, 3, 4, 5

a!forEach(

items: enumerate(fv!item) + 1,

expression: fv!item

)

This means:

So this generates:

| Outer fv!item | Inner Output |

| ------------- | ----------------- |

| 1 | `{1}` |

| 2 | `{2, 2}` |

| 3 | `{3, 3, 3}` |

| 4 | `{4, 4, 4, 4}` |

| 5 | `{5, 5, 5, 5, 5}` |

joinarray(innerArray, " ")

Converts each inner array into a space-separated string:

| Inner Array | After joinarray |

| ------------- | --------------- |

| `{1}` | `"1"` |

| `{2,2}` | `"2 2"` |

| `{3,3,3}` | `"3 3 3"` |

| `{4,4,4,4}` | `"4 4 4 4"` |

| `{5,5,5,5,5}` | `"5 5 5 5 5"` |

Final Output

The whole expression returns this list of strings: