Valid = false
	While (valid = false)
		DO index 1 to 9
		IF (new_item = itemArray[index]) THEN
		BasketArray[index] = new_item
		Valid = true
		ELSE IF
			Prompt “Please enter a new item”
			Get new_item
		ENDIF
		IF (quantity < = 9) THEN
		quantityArray[index] = quantity
		valid = true
		ELSE IF
		Prompt” Incorrect item quantity, Please enter a new quantity”
			Get quantity
		ENDIF
		IF (new_item = basketArray[index] THEN
			Prompt “That item already exists in the basket, Please enter a new item”
			Get new_item
			Valid = false
		ELSE
		Valid = true
		EndIF