Input in a number representing a car type, until the number 0 is

input. There are three types of cars: 1 = luxury, 2 = commercial, 3 =
sedan.
Count how many of each type there are and print out this total with a
message stating what type of car it is.

int t[1..3]

int n=0
while (n≠0) {
read n
if(n<0) {print error}
else if (n <= 3) {
t[n]++
}
}
for (n=1..3) {
printf "There are %d cars of type %d.",t[n],n
}

To solve this problem, you can use a loop to continually ask the user for input until the number 0 is entered. Inside the loop, you can keep track of the count for each car type using three variables. Here's the code:

```python
# Initialize the count variables
luxury_count = 0
commercial_count = 0
sedan_count = 0

# Ask for input until 0 is entered
while True:
car_type = int(input("Enter a number representing a car type (1 for luxury, 2 for commercial, 3 for sedan): "))

# Check if the entered number is 0, if so break the loop
if car_type == 0:
break

# Increment the count variables based on the entered car type
if car_type == 1:
luxury_count += 1
elif car_type == 2:
commercial_count += 1
elif car_type == 3:
sedan_count += 1

# Print the total count for each car type
print(f"Total luxury cars: {luxury_count}")
print(f"Total commercial cars: {commercial_count}")
print(f"Total sedan cars: {sedan_count}")
```

Explanation:
1. We start by initializing three variables `luxury_count`, `commercial_count`, and `sedan_count` to keep track of the count for each car type.
2. Inside the `while` loop, we continuously ask the user to input a number representing a car type using the `input()` function. We convert the input to an integer using the `int()` function.
3. We check if the entered number is 0. If it is, we break out of the loop using the `break` statement.
4. Based on the entered number, we increment the corresponding count variable using the appropriate `if` statements.
5. After the loop ends, we print the total count for each car type using `print()` statements and string formatting (`f""`) to display the count values.