A laboratory inventory system tracks hazardous chemical containers. Each container material has a specific code, as shown below:

A program is written to log new batches into the inventory database. The program:

• prompts the operator to input the container material code
• prompts the operator to input the unique batch number
• calls the prewritten function IsValidContainer() to check whether the entered material code is valid
• if valid, combines the material code and batch number with a hyphen, and calls the procedure RegisterBatch() to update the database

01  containerCode = input("Enter container material code: ")
02  batchNum = input("Enter batch number: ")
03  if (IsValidContainer(containerCode)) then
04      trackingRef = containerCode + "-" + batchNum
05      RegisterBatch(trackingRef)
06  else
07      print("Error: Invalid container code.")
08  endif