python-examples/loops.py at master · ogarmela/python-examples · GitHub

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#loops
>>> sum = 0
>>> i = 1
>>> n = 5
>>> while i <= n:
	sum = sum + i
	i = i + 1


>>> i
6
>>> sum
15
>>> sum = 0
>>> i = 1
>>> while i < 2 * n:
	sum = sum + 1
	i = i + 2


>>> sum
5
>>> sum = 0
>>> x = int(input("Enter a number. 999 to exit "))
Enter a number. 999 to exit 3
>>> while x != 999:
	sum = sum + x
	x = int(input("Enter a number. 999 to exit "))


Enter a number. 999 to exit 1
Enter a number. 999 to exit 2
Enter a number. 999 to exit 3
Enter a number. 999 to exit 999
>>> sum
9
>>> count = 0
>>> n = 4
>>> while n > 1:
	n = n // 2
	count = count + 1


>>> n
1.0
>>> count
2
>>>