A computer program is a set of instructions for the computer to run. The instructions are also known as computer code. Reading and writing the instructions is known as programming or coding.

Instructions are written into and stored in a file. The instructions are read and executed from the file by the computer, from top to bottom.

	instruction 1
	instruction 2
	instruction 3
	etc…

Computer instructions are hard for people to read and write. It's literally 1s and 0s. This is what it looks like:

	0011 0000 0000 0000 
	0010 0010 0000 1111 
	0101 1001 0010 0000 
	0101 1011 0110 0000  

Instead, we write the instructions in Python, a programming language. The Python interpreter takes a Python file and converts it into something a computer can read, then it asks the computer to perform all the instructions.

Here is an example of Python code that counts from 0 to 10.

	limit = 10
	print("lets count to " + str(limit))
	counter = 0
	while counter < limit:
		counter = counter + 1
		print(counter)
	print("all done!")

Let's run the example Python code using the inline code editor. Click the 'Run' button to execute the code. You can change the value of limit from 10 to count to different numbers.