Main Iterating Functions in Python

Most common languages including Python provides several built-in functions to accomplish iteration. Here's a list of some of the important ones:

1. for loop: Used to iterate over a sequence of elements

2. while loop: Executes a set of statements as long as a condition is true

3. enumerate() function: Adds a counter to an iterable

4. range() function: Generates a sequence of numbers

5. map() function: Applies a function to all items in an input list

6. filter() function: Constructs an iterator from elements of an iterable for which a function returns true

Code Snippets

1. Using for loop

for i in ['Python', 'Java', 'C++']:
    print(i)

2. Using while loop

i = 0
while i < 5:
    print(i)
    i += 1

3. Using enumerate() function

for i, value in enumerate(['Python', 'Java', 'C++']):
    print(i, value)

4. Using range() function

for i in range(5):
    print(i)

5. Using map() function

numbers = [1, 2, 3, 4]
squared = map(lambda x: x**2, numbers)
print(list(squared))

6. Using filter() function

numbers = [1, 2, 3, 4, 5]
even_numbers = filter(lambda x: x%2 == 0, numbers)
print(list(even_numbers))

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