def add(a, b):
result = a + b
return result
sum = add(5, 3)
print(sum)
In this example, the function add() returns the sum of a and b
PASSENGERS.DAT stores the records of passengers using the following structure:Create() – to input data for passengers and write it in the binary file PASSENGERS.DAT.SearchDestn(D) – to read contents from the file PASSENGERS.DAT and display the details of those Passengers whose DESTN matches with the value of D.UpdateFare() – to increase the fare of all passengers by 5% and rewrite the updated records into the file PASSENGERS.DAT.