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Loops in python

This is less like the for a keyword in other programming languages and works more like an iterator method as found in other object-orientated programming languages.

1- while loop: Repeats a statement or group of statements while a given condition is TRUE. It tests the condition before executing the loop body.

2- for loop: Executes a sequence of statements multiple times and abbreviates the code that manages the loop variable.

For loop


A for loop is used for iterating over a sequence (that is either a list, a tuple, a dictionary, a set, or a string).

With the for loop, we can execute a set of statements, once for each item in a list, tuple, set etc.

Example:


fruits = ["apple", "banana", "cherry"]
for x in fruits:
  print(x)

Output:

apple
banana 
cherry

Looping Through a String:

Even strings are iterable objects, they contain a sequence of characters:

Example Loop through the letters in the word "Gehad":


for x in "Gehad":
  print(x)

Output:



G
e
h
a
d

The break Statement

With the break statement we can stop the loop before it has looped through all the items:


Example Exit the loop when x is "banana":


fruits = ["apple", "banana", "cherry"]
for x in fruits:
  print(x)
  if x == "banana":
    break

output:

apple
banana 

The continue Statement With the continue statement we can stop the current iteration of the loop, and continue with the next:

Example Do not print banana:


fruits = ["apple", "banana", "cherry"]
for x in fruits:
  if x == "banana":
    continue
  print(x)

Output:



apple 
cherry 

The range() Function:

To loop through a set of code a specified number of times, we can use the range() function, The range() function returns a sequence of numbers, starting from 0 by default, increments by 1 (by default), and ends at a specified number.

Example Using the range() function:


for x in range(6):
  print(x)

Output:

0 
1
2
3
4
5

Thank you..

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