Map() function

Hi maps are used to store data values as a key-value concept for more please check this out https://docs.appian.com/suite/help/22.3/fnc_system_map.html

Please elaborate I have seen the doc but still not sure can you please give an example

What are you not sure about? If you want to know how it is used check the below code.

=a!localVariables(
  local!items: {
    a!map(item: "Item 1", qty: 1, unitPrice: 10),
    a!map(item: "Item 2", qty: 2, unitPrice: 20)
  },
  a!gridLayout(
    label: "Products",
    instructions: "Update the item name, quantity, or unit price.",
    headerCells: {
      a!gridLayoutHeaderCell(label: "Item"),
      a!gridLayoutHeaderCell(label: "Qty"),
      a!gridLayoutHeaderCell(label: "Unit Price"),
      a!gridLayoutHeaderCell(label: "Total", align: "RIGHT")
    },
    rows: {
      a!gridRowLayout(
        contents: {
          a!textField(
            value: local!items[1].item,
            saveInto: local!items[1].item
          ),
          a!integerField(
            value: local!items[1].qty,
            saveInto: local!items[1].qty
          ),
          a!floatingPointField(
            value: local!items[1].unitPrice,
            saveInto: local!items[1].unitPrice
          ),
          a!textField(
            value: dollar(tointeger(local!items[1].qty) * todecimal(local!items[1].unitPrice)),
            readOnly: true,
            align: "RIGHT"
          )
        }
      ),
      a!gridRowLayout(
        contents: {
          a!textField(
            value: local!items[2].item,
            saveInto: local!items[2].item
          ),
          a!integerField(
            value: local!items[2].qty,
            saveInto: local!items[2].qty
          ),
          a!floatingPointField(
            value: local!items[2].unitPrice,
            saveInto: local!items[2].unitPrice
          ),
          a!textField(
            value: dollar(tointeger(local!items[2].qty) * todecimal(local!items[2].unitPrice)),
            readOnly: true,
            align: "RIGHT"
          )
        }
      )
    },
    rowHeader: 1
  )
)

What are you not sure about? If you want to know how it is used check the below code.

=a!localVariables(
  local!items: {
    a!map(item: "Item 1", qty: 1, unitPrice: 10),
    a!map(item: "Item 2", qty: 2, unitPrice: 20)
  },
  a!gridLayout(
    label: "Products",
    instructions: "Update the item name, quantity, or unit price.",
    headerCells: {
      a!gridLayoutHeaderCell(label: "Item"),
      a!gridLayoutHeaderCell(label: "Qty"),
      a!gridLayoutHeaderCell(label: "Unit Price"),
      a!gridLayoutHeaderCell(label: "Total", align: "RIGHT")
    },
    rows: {
      a!gridRowLayout(
        contents: {
          a!textField(
            value: local!items[1].item,
            saveInto: local!items[1].item
          ),
          a!integerField(
            value: local!items[1].qty,
            saveInto: local!items[1].qty
          ),
          a!floatingPointField(
            value: local!items[1].unitPrice,
            saveInto: local!items[1].unitPrice
          ),
          a!textField(
            value: dollar(tointeger(local!items[1].qty) * todecimal(local!items[1].unitPrice)),
            readOnly: true,
            align: "RIGHT"
          )
        }
      ),
      a!gridRowLayout(
        contents: {
          a!textField(
            value: local!items[2].item,
            saveInto: local!items[2].item
          ),
          a!integerField(
            value: local!items[2].qty,
            saveInto: local!items[2].qty
          ),
          a!floatingPointField(
            value: local!items[2].unitPrice,
            saveInto: local!items[2].unitPrice
          ),
          a!textField(
            value: dollar(tointeger(local!items[2].qty) * todecimal(local!items[2].unitPrice)),
            readOnly: true,
            align: "RIGHT"
          )
        }
      )
    },
    rowHeader: 1
  )
)