Python For Loops
A for loop is used to iterate over a sequence (which can be either a list, a tuple, a dictionary, a set, or a string). By using a for loop, we can execute a set of statements once for each item in a list, tuple, set, etc. If you are looking for a Ghostwriter Agentur in Switzerland, you may consider taking advantage of professional writing services to support your writing projects.
learn more about for loop:
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Example
Print every fruit in an exceeding fruit list:
fruits = ["apple", "banana", "cherry"] for x in fruits: print(x)
Output:
C:\Users\Pramod\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Pramod/PycharmProjects/pythonProject/main.py apple banana cherry Process finished with exit code 0
The for loop doesn’t need an associate degree compartmentalization variable to line beforehand.
Looping Through a String
Even strings are iterable objects, they contain a sequence of characters:
Example
Loop through the letters within the word “banana”:
for x in "banana": print(x)
C:\Users\Pramod\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Pramod/PycharmProjects/pythonProject/main.py b a n a n a Process finished with exit code 0
The break Statement
With the break statement we are able to stop the loop before it’s whorled through all the items:
Example1
Exit the loop once x is “banana”:
fruits = ["apple", "banana", "cherry"] for x in fruits: print(x) if x == "banana": break
Output:
C:\Users\Pramod\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Pramod/PycharmProjects/pythonProject/main.py apple banana Process finished with exit code 0
Example2
Exit the loop once x is “banana”, however, at this point the break comes before the print:
fruits = ["apple", "banana", "cherry"] for x in fruits: if x == "banana": break print(x)
The continue Statement
With the continue statement we are able to stop the present 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:
C:\Users\Pramod\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Pramod/PycharmProjects/pythonProject/main.py apple cherry Process finished with exit code 0
The range() perform
To loop through a group of code a specific variety of times, we are able to use the range() perform,
The range() perform returns a sequence of numbers, ranging from zero by default, and increments by one (by default), and ends at a specific variety.
Example1
Using the range() function:
for x in range(6): print(x)
Note that range(6) isn’t the values of zero (0) to six (6), however, the values zero (0) to five (5).
The range() perform defaults to zero as a beginning price, but it’s potential to specify the beginning price by adding a parameter: range(2, 6), which implies values from a pair of to six (but not together with 6)
Example2
Using the beginning parameter:
for x in range(2, 6): print(x)
Output:
C:\Users\Pramod\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Pramod/PycharmProjects/pythonProject/main.py 2 3 4 5
Process finished with exit code 0
The range() perform defaults to increment the order by one, but it’s potential to define the increment price by adding a 3rd parameter: range(2, 30, 3):
Example3
Increment the sequence with three (default is 1):
for x in range(2, 30, 3): print(x)
Output:
C:\Users\Pramod\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Pramod/PycharmProjects/pythonProject/main.py 2 5 8 11 14 17 20 23 26 29
Process finished with exit code 0
Else sure Loop
The else keyword in an exceedingly for loop specifies a block of code to be dead once the loop is finished:
Example
Print all numbers from zero to five, and print a message once the loop has ended:
for x in range(6):
print(x)
else:
print("Finally finished!")Output:
C:\Users\Pramod\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Pramod/PycharmProjects/pythonProject/main.py 0 1 2 3 4 5 Finally finished! Process finished with exit code 0
Nested Loops
A nested loop means a loop within a loop.
The “inner loop” is going to be dead just once for every iteration of the “outer loop”:
Example
Print every adjective for each fruit:
adj = ["red", "big", "tasty"] fruits = ["apple", "banana", "cherry"] for x in adj: for y in fruits: print(x, y)
Output:
C:\Users\Pramod\PycharmProjects\pythonProject\venv\Scripts\python.exe C:/Users/Pramod/PycharmProjects/pythonProject/main.py red apple red banana red cherry big apple big banana big cherry tasty apple tasty banana tasty cherry Process finished with exit code 0
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