How can I save the value in different indexes ?

Hi, you can use below save configuration to save values at a particular index of a rule input. If you are using forEach loop then you can use fv!index to define your indexes.

a!save(ri!quantity[index], yourValue)

Instead of a normal local variable, you have to create it with the Map function. Please find the attached code for reference.

a!localVariables(
  local!items: {
    a!map(item: "3", itemName: "Bag", price: "1000"),
    a!map(
      item: "1",
      itemName: "Laptop",
      price: "50000"
    ),
    a!map(item: "3", itemName: "Bag", price: "1000")
  },
  local!quanPrice: a!forEach(
    items: local!items,
    expression: {
      {
        a!map(
          quantity: 10,
          total: tointeger(fv!item.price) * 10
        )
      }
    }
  ),
  a!gridLayout(
    headerCells: {
      a!gridLayoutHeaderCell(label: "Item"),
      a!gridLayoutHeaderCell(label: "Item Name"),
      a!gridLayoutHeaderCell(label: "Price"),
      a!gridLayoutHeaderCell(label: "Quantity"),
      a!gridLayoutHeaderCell(label: "Total")
    },
    rows: a!forEach(
      items: local!items,
      expression: {
        a!gridRowLayout(
          id: fv!index,
          contents: {
            a!textField(
              value: fv!item.item,
              saveInto: fv!item.item,
              readOnly: true()
            ),
            a!textField(
              value: fv!item.itemName,
              saveInto: fv!item.itemName,
              readOnly: true()
            ),
            a!textField(
              value: fv!item.price,
              saveInto: fv!item.price,
              readOnly: true()
            ),
            a!textField(
              value: local!quanPrice[fv!index].quantity,
              saveInto: local!quanPrice[fv!index].quantity,
              
            ),
            a!textField(
              value: local!quanPrice[fv!index].total,
              saveInto: local!quanPrice[fv!index].total,
              
            )
          }
        )
      }
    )
  )
)