Loops in Python

Loops are very used in programing when is necesary repeat a instruction x times. Some examples : search a number in a list or wait for a specific input.

In python the most important loop is "while", while a condition is met then the block of code inside of itself continue executing.

Syntax

example_number = 0

while example_number < 3 :

    print(example_number)

    example_number = example_number + 1

output : 
0
1
2

Useful when we dont know the exact number of iterations. If we have the number of iterations defined then "for" is better than while loop.
Example : count odd numbers in a list

for i in range (5):

    if i % 2 != 0:
        print(i)

output : 
1
3

Also exist "for each" with this loop is possible iterate in a list and the iterator will be each element.
Example: print each element of a list

example_list = ['house', 'apple', 1]

for element in example_list:
    print(element)

output : 
house
apple
1