Write a program to count a total number of lines and count thetotal number of lines starting with 'A', 'B', and 'C' from the fileMyFile.txt

Sure, here is a Python program that does that:

def count_lines(filename):
    total_lines = 0
    lines_starting_with_A = 0
    lines_starting_with_B = 0
    lines_starting_with_C = 0

    with open(filename, 'r') as file:
        for line in file:
            total_lines += 1
            if line.startswith('A'):
                lines_starting_with_A += 1
            elif line.startswith('B'):
                lines_starting_with_B += 1
            elif line.startswith('C'):
                lines_starting_with_C += 1

    return total_lines, lines_starting_with_A, lines_starting_with_B, lines_starting_with_C

total, A, B, C = count_lines('MyFile.txt')
print(f"Total lines: {total}")
print(f"Lines starting with A: {A}")
print(f"Lines starting with B: {B}")
print(f"Lines starting with C: {C}")

This program opens the file MyFile.txt in read mode, then iterates over each line in the file. It increments the total line count for each line, and checks the first character of each line to see if it's 'A', 'B', or 'C', incrementing the respective count if it is. Finally, it prints out the total number of lines and the number of lines starting with 'A', 'B', and 'C'.