PYTHON

what is iteration in python

# Iteration is the execution of a statement repeatedly and without
# making any errors. 

python iteration

# a 'while' loop runs until the condition is broken
a = "apple"
while a == "apple":
  a = "banana" # breaks loop as 'a' no longer equals 'apple'
  
# a 'for' loop runs for the given number of iterations...
for i in range(10):
  print(i) # will print 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

# ... or through a sequence
array = [3, 6, 8, 2, 1]
for number in array:
  print(number) # will print 3, 6, 8, 2, 1

Python Iterating Through an Iterator

# define a list
my_list = [4, 7, 0, 3]
# get an iterator using iter()
my_iter = iter(my_list)
# iterate through it using next()
# Output: 4
print(next(my_iter))
# Output: 7
print(next(my_iter))
# next(obj) is same as obj.__next__()

# Output: 0
print(my_iter.__next__())

# Output: 3
print(my_iter.__next__())

# This will raise error, no items left
next(my_iter)

Iterating With for Loops in Python

names = ["Preet", "Ranjeet", "Adil"]
for name in names:
    print(name)

iterate python

for n in range(3):   
print(n)

how to use iteration in python

n = 5
while n > 0:
    print n
    n = n-1
print 'Blastoff!'