Learn Python programming with this Python tutorial for beginners!
Learn how to use Python for loop
for loop is used for iterating over a sequence (that is either a list, a tuple, a dictionary, a set, or a string).
This is less like the
for keyword in other programming languages, and works more like an iterator method as found in other object-orientated programming languages.
for loop we can execute a set of statements, once for each item in a list, tuple, set etc.
Print each fruit in a fruit list:
fruits = ["apple", "banana", "cherry"] for x in fruits: print(x)
The ```for`` loop does not require an indexing variable to set beforehand.
Even strings are iterable objects, they contain a sequence of characters:
Loop through the letters in the word “banana”:
for x in "banana": print(x)
break statement we can stop the loop before it has looped through all the items:
Exit the loop when
x is “banana”:
fruits = ["apple", "banana", "cherry"] for x in fruits: print(x) if x == "banana": break
Exit the loop when
x is “banana”, but this time the break comes before the print:
fruits = ["apple", "banana", "cherry"] for x in fruits: if x == "banana": break print(x)
continue statement we can stop the current iteration of the loop, and continue with the next:
Do not print banana:
fruits = ["apple", "banana", "cherry"] for x in fruits: if x == "banana": continue print(x)
To loop through a set of code a specified number of times, we can use the
range() function returns a sequence of numbers, starting from 0 by default, and increments by 1 (by default), and ends at a specified number.
Using the range() function:
for x in range(6): print(x)
range(6) is not the values of 0 to 6, but the values 0 to 5.
range() function defaults to 0 as a starting value, however it is possible to specify the starting value by adding a parameter:
range(2, 6), which means values from 2 to 6 (but not including 6):
Using the start parameter:
for x in range(2, 6): print(x)
range() function defaults to increment the sequence by 1, however it is possible to specify the increment value by adding a third parameter:
range(2, 30, **3**):
Increment the sequence with 3 (default is 1):
for x in range(2, 30, 3): print(x)
else keyword in a
for loop specifies a block of code to be executed when the loop is finished:
Print all numbers from 0 to 5, and print a message when the loop has ended:
for x in range(6): print(x) else: print("Finally finished!")
A nested loop is a loop inside a loop.
The “inner loop” will be executed one time for each iteration of the “outer loop”:
Print each adjective for every fruit:
adj = ["red", "big", "tasty"] fruits = ["apple", "banana", "cherry"] for x in adj: for y in fruits: print(x, y)
for loops cannot be empty, but if you for some reason have a
for loop with no content, put in the
pass statement to avoid getting an error.
for x in [0, 1, 2]: pass
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Welcome to my Blog , In this article, you are going to learn the top 10 python tips and tricks.
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Welcome to my Blog, In this article, we will learn python lambda function, Map function, and filter function.
Lambda function in python: Lambda is a one line anonymous function and lambda takes any number of arguments but can only have one expression and python lambda syntax is
Syntax: x = lambda arguments : expression
Now i will show you some python lambda function examples:
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A Python tutorial to understand the uses of for loop in various ways including examples.
Python is a general-purpose programming language, which emphasizes making programming easy, efficient coding, and unleashes the user’s potential. Loops are the vital part of programming as it allows the user to repetitive use a set of codes using loops. So in the following article, we will see how to use
for loops in python.
Till the iteration of the last item in the sequence, for loop run the instructions. It iterates over sets of instructions in sequence, arrays, and a tuple for a pre-defined period or until the last item and calculation are executed.
For loop can be categorized in three ways.
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Python is a renowned general-purpose programming language. Unlike HTML or CSS, general-purpose programming languages are used in several application domains.
In programming languages, loops are a set of instructions that execute a sequence of code continuously until a certain condition is fulfilled. Most modern programming languages do include the concept of loops. The syntax for loops in each language may differ but the logic being used remains the same.
Many programming languages have several types of loops and the most renowned ones are while and for loop. Today we will only learn about while loop and where it should be preferred over other kinds of loops.
In most cases loops are interchangeable with each other but while loop should be preferred over other loops when the required condition is boolean. We can think of a while loop as a repeating if statement, to make the concept easier to understand.
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Python is awesome, it’s one of the easiest languages with simple and intuitive syntax but wait, have you ever thought that there might ways to write your python code simpler?
In this tutorial, you’re going to learn a variety of Python tricks that you can use to write your Python code in a more readable and efficient way like a pro.
Swapping value in Python
Instead of creating a temporary variable to hold the value of the one while swapping, you can do this instead
>>> FirstName = "kalebu" >>> LastName = "Jordan" >>> FirstName, LastName = LastName, FirstName >>> print(FirstName, LastName) ('Jordan', 'kalebu')
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