Countdown

A simple Countdown

Write a program to output a simple countdown from 10 to 0. Start with a variable to hold your current_number and use a while-loop to deal with the printing and updating the number.

Hints

Consider the following:

• What should your starting value for the current_number be?
• What condition should be fulfilled to continue the loop?
• How do you increase the value in the current_number variable?
• Should you first print the current_value and count it up afterwards or the other way around?

Expected Output

10
9
8
7
6
5
4
3
2
1
0

Starting the Engine

When the countdown has reached 0, also output the word Liftoff.

Expected Output

10
9
8
7
6
5
4
3
2
1
0 Liftoff

A less simple Countdown

Write a programm that again implements the countdown from 10 down to 0. This time, there are some additional rules:

• After reaching the number 6, it shall output Starting engine once.
• After reaching the number 4, it shall output the words and counting after each number,
• Except for the number 0, which is instead followed by Liftoff instead.

Expected Output

10
9
8
7
6 Starting engine
5
4 and counting
3 and counting
2 and counting
1 and counting
0 Liftoff