Line Numbers Python code:

#Prompt and read the name of the file from the user
filename = input("Enter the name of the file: ")

#Display the contents of the file with each line
#preceded with a line number followed by a colon.
#The line numbering should start at 1.
try:
    with open(filename, 'r') as file:
        lines = file.readlines()

        print("File Contents:")
        for i, line in enumerate(lines, start=1):
            # Print line number followed by a colon and the line content
            print(f"{i}: {line.rstrip()}")

except FileNotFoundError:
    print(f"File '{filename}' not found.")
except IOError:
    print(f"An error occurred while reading the file '{filename}'.")

Data in "inFile.txt":

Hello
Python
welcome
to the python world

Executed Output:

Enter the name of the file: inFile.txt
File Contents:
1: Hello
2: Python
3: welcome
4: to the python world